//  
//  
//  		    GNU GENERAL PUBLIC LICENSE
//  		       Version 2, June 1991
//  
//   Copyright (C) 1989, 1991 Free Software Foundation, Inc.
//                         59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//   Everyone is permitted to copy and distribute verbatim copies
//   of this license document, but changing it is not allowed.
//  
//  			    Preamble
//  
//    The licenses for most software are designed to take away your
//  freedom to share and change it.  By contrast, the GNU General Public
//  License is intended to guarantee your freedom to share and change free
//  software--to make sure the software is free for all its users.  This
//  General Public License applies to most of the Free Software
//  Foundation's software and to any other program whose authors commit to
//  using it.  (Some other Free Software Foundation software is covered by
//  the GNU Library General Public License instead.)  You can apply it to
//  your programs, too.
//  
//    When we speak of free software, we are referring to freedom, not
//  price.  Our General Public Licenses are designed to make sure that you
//  have the freedom to distribute copies of free software (and charge for
//  this service if you wish), that you receive source code or can get it
//  if you want it, that you can change the software or use pieces of it
//  in new free programs; and that you know you can do these things.
//  
//    To protect your rights, we need to make restrictions that forbid
//  anyone to deny you these rights or to ask you to surrender the rights.
//  These restrictions translate to certain responsibilities for you if you
//  distribute copies of the software, or if you modify it.
//  
//    For example, if you distribute copies of such a program, whether
//  gratis or for a fee, you must give the recipients all the rights that
//  you have.  You must make sure that they, too, receive or can get the
//  source code.  And you must show them these terms so they know their
//  rights.
//  
//    We protect your rights with two steps: (1) copyright the software, and
//  (2) offer you this license which gives you legal permission to copy,
//  distribute and/or modify the software.
//  
//    Also, for each author's protection and ours, we want to make certain
//  that everyone understands that there is no warranty for this free
//  software.  If the software is modified by someone else and passed on, we
//  want its recipients to know that what they have is not the original, so
//  that any problems introduced by others will not reflect on the original
//  authors' reputations.
//  
//    Finally, any free program is threatened constantly by software
//  patents.  We wish to avoid the danger that redistributors of a free
//  program will individually obtain patent licenses, in effect making the
//  program proprietary.  To prevent this, we have made it clear that any
//  patent must be licensed for everyone's free use or not licensed at all.
//  
//    The precise terms and conditions for copying, distribution and
//  modification follow.
//  
//  		    GNU GENERAL PUBLIC LICENSE
//     TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
//  
//    0. This License applies to any program or other work which contains
//  a notice placed by the copyright holder saying it may be distributed
//  under the terms of this General Public License.  The "Program", below,
//  refers to any such program or work, and a "work based on the Program"
//  means either the Program or any derivative work under copyright law:
//  that is to say, a work containing the Program or a portion of it,
//  either verbatim or with modifications and/or translated into another
//  language.  (Hereinafter, translation is included without limitation in
//  the term "modification".)  Each licensee is addressed as "you".
//  
//  Activities other than copying, distribution and modification are not
//  covered by this License; they are outside its scope.  The act of
//  running the Program is not restricted, and the output from the Program
//  is covered only if its contents constitute a work based on the
//  Program (independent of having been made by running the Program).
//  Whether that is true depends on what the Program does.
//  
//    1. You may copy and distribute verbatim copies of the Program's
//  source code as you receive it, in any medium, provided that you
//  conspicuously and appropriately publish on each copy an appropriate
//  copyright notice and disclaimer of warranty; keep intact all the
//  notices that refer to this License and to the absence of any warranty;
//  and give any other recipients of the Program a copy of this License
//  along with the Program.
//  
//  You may charge a fee for the physical act of transferring a copy, and
//  you may at your option offer warranty protection in exchange for a fee.
//  
//    2. You may modify your copy or copies of the Program or any portion
//  of it, thus forming a work based on the Program, and copy and
//  distribute such modifications or work under the terms of Section 1
//  above, provided that you also meet all of these conditions:
//  
//      a) You must cause the modified files to carry prominent notices
//      stating that you changed the files and the date of any change.
//  
//      b) You must cause any work that you distribute or publish, that in
//      whole or in part contains or is derived from the Program or any
//      part thereof, to be licensed as a whole at no charge to all third
//      parties under the terms of this License.
//  
//      c) If the modified program normally reads commands interactively
//      when run, you must cause it, when started running for such
//      interactive use in the most ordinary way, to print or display an
//      announcement including an appropriate copyright notice and a
//      notice that there is no warranty (or else, saying that you provide
//      a warranty) and that users may redistribute the program under
//      these conditions, and telling the user how to view a copy of this
//      License.  (Exception: if the Program itself is interactive but
//      does not normally print such an announcement, your work based on
//      the Program is not required to print an announcement.)
//  
//  These requirements apply to the modified work as a whole.  If
//  identifiable sections of that work are not derived from the Program,
//  and can be reasonably considered independent and separate works in
//  themselves, then this License, and its terms, do not apply to those
//  sections when you distribute them as separate works.  But when you
//  distribute the same sections as part of a whole which is a work based
//  on the Program, the distribution of the whole must be on the terms of
//  this License, whose permissions for other licensees extend to the
//  entire whole, and thus to each and every part regardless of who wrote it.
//  
//  Thus, it is not the intent of this section to claim rights or contest
//  your rights to work written entirely by you; rather, the intent is to
//  exercise the right to control the distribution of derivative or
//  collective works based on the Program.
//  
//  In addition, mere aggregation of another work not based on the Program
//  with the Program (or with a work based on the Program) on a volume of
//  a storage or distribution medium does not bring the other work under
//  the scope of this License.
//  
//    3. You may copy and distribute the Program (or a work based on it,
//  under Section 2) in object code or executable form under the terms of
//  Sections 1 and 2 above provided that you also do one of the following:
//  
//      a) Accompany it with the complete corresponding machine-readable
//      source code, which must be distributed under the terms of Sections
//      1 and 2 above on a medium customarily used for software interchange; or,
//  
//      b) Accompany it with a written offer, valid for at least three
//      years, to give any third party, for a charge no more than your
//      cost of physically performing source distribution, a complete
//      machine-readable copy of the corresponding source code, to be
//      distributed under the terms of Sections 1 and 2 above on a medium
//      customarily used for software interchange; or,
//  
//      c) Accompany it with the information you received as to the offer
//      to distribute corresponding source code.  (This alternative is
//      allowed only for noncommercial distribution and only if you
//      received the program in object code or executable form with such
//      an offer, in accord with Subsection b above.)
//  
//  The source code for a work means the preferred form of the work for
//  making modifications to it.  For an executable work, complete source
//  code means all the source code for all modules it contains, plus any
//  associated interface definition files, plus the scripts used to
//  control compilation and installation of the executable.  However, as a
//  special exception, the source code distributed need not include
//  anything that is normally distributed (in either source or binary
//  form) with the major components (compiler, kernel, and so on) of the
//  operating system on which the executable runs, unless that component
//  itself accompanies the executable.
//  
//  If distribution of executable or object code is made by offering
//  access to copy from a designated place, then offering equivalent
//  access to copy the source code from the same place counts as
//  distribution of the source code, even though third parties are not
//  compelled to copy the source along with the object code.
//  
//    4. You may not copy, modify, sublicense, or distribute the Program
//  except as expressly provided under this License.  Any attempt
//  otherwise to copy, modify, sublicense or distribute the Program is
//  void, and will automatically terminate your rights under this License.
//  However, parties who have received copies, or rights, from you under
//  this License will not have their licenses terminated so long as such
//  parties remain in full compliance.
//  
//    5. You are not required to accept this License, since you have not
//  signed it.  However, nothing else grants you permission to modify or
//  distribute the Program or its derivative works.  These actions are
//  prohibited by law if you do not accept this License.  Therefore, by
//  modifying or distributing the Program (or any work based on the
//  Program), you indicate your acceptance of this License to do so, and
//  all its terms and conditions for copying, distributing or modifying
//  the Program or works based on it.
//  
//    6. Each time you redistribute the Program (or any work based on the
//  Program), the recipient automatically receives a license from the
//  original licensor to copy, distribute or modify the Program subject to
//  these terms and conditions.  You may not impose any further
//  restrictions on the recipients' exercise of the rights granted herein.
//  You are not responsible for enforcing compliance by third parties to
//  this License.
//  
//    7. If, as a consequence of a court judgment or allegation of patent
//  infringement or for any other reason (not limited to patent issues),
//  conditions are imposed on you (whether by court order, agreement or
//  otherwise) that contradict the conditions of this License, they do not
//  excuse you from the conditions of this License.  If you cannot
//  distribute so as to satisfy simultaneously your obligations under this
//  License and any other pertinent obligations, then as a consequence you
//  may not distribute the Program at all.  For example, if a patent
//  license would not permit royalty-free redistribution of the Program by
//  all those who receive copies directly or indirectly through you, then
//  the only way you could satisfy both it and this License would be to
//  refrain entirely from distribution of the Program.
//  
//  If any portion of this section is held invalid or unenforceable under
//  any particular circumstance, the balance of the section is intended to
//  apply and the section as a whole is intended to apply in other
//  circumstances.
//  
//  It is not the purpose of this section to induce you to infringe any
//  patents or other property right claims or to contest validity of any
//  such claims; this section has the sole purpose of protecting the
//  integrity of the free software distribution system, which is
//  implemented by public license practices.  Many people have made
//  generous contributions to the wide range of software distributed
//  through that system in reliance on consistent application of that
//  system; it is up to the author/donor to decide if he or she is willing
//  to distribute software through any other system and a licensee cannot
//  impose that choice.
//  
//  This section is intended to make thoroughly clear what is believed to
//  be a consequence of the rest of this License.
//  
//    8. If the distribution and/or use of the Program is restricted in
//  certain countries either by patents or by copyrighted interfaces, the
//  original copyright holder who places the Program under this License
//  may add an explicit geographical distribution limitation excluding
//  those countries, so that distribution is permitted only in or among
//  countries not thus excluded.  In such case, this License incorporates
//  the limitation as if written in the body of this License.
//  
//    9. The Free Software Foundation may publish revised and/or new versions
//  of the General Public License from time to time.  Such new versions will
//  be similar in spirit to the present version, but may differ in detail to
//  address new problems or concerns.
//  
//  Each version is given a distinguishing version number.  If the Program
//  specifies a version number of this License which applies to it and "any
//  later version", you have the option of following the terms and conditions
//  either of that version or of any later version published by the Free
//  Software Foundation.  If the Program does not specify a version number of
//  this License, you may choose any version ever published by the Free Software
//  Foundation.
//  
//    10. If you wish to incorporate parts of the Program into other free
//  programs whose distribution conditions are different, write to the author
//  to ask for permission.  For software which is copyrighted by the Free
//  Software Foundation, write to the Free Software Foundation; we sometimes
//  make exceptions for this.  Our decision will be guided by the two goals
//  of preserving the free status of all derivatives of our free software and
//  of promoting the sharing and reuse of software generally.
//  
//  			    NO WARRANTY
//  
//    11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
//  FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
//  OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
//  PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
//  OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
//  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
//  TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
//  PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
//  REPAIR OR CORRECTION.
//  
//    12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
//  WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
//  REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
//  INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
//  OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
//  TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
//  YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
//  PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
//  POSSIBILITY OF SUCH DAMAGES.
//  
//  		     END OF TERMS AND CONDITIONS
//  
//  
//  
//  
//  
//  
//  
//  
//  	    How to Apply These Terms to Your New Programs
//  
//    If you develop a new program, and you want it to be of the greatest
//  possible use to the public, the best way to achieve this is to make it
//  free software which everyone can redistribute and change under these terms.
//  
//    To do so, attach the following notices to the program.  It is safest
//  to attach them to the start of each source file to most effectively
//  convey the exclusion of warranty; and each file should have at least
//  the "copyright" line and a pointer to where the full notice is found.
//  
//      <one line to give the program's name and a brief idea of what it does.>
//      Copyright (C) <year>  <name of author>
//  
//      This program is free software; you can redistribute it and/or modify
//      it under the terms of the GNU General Public License as published by
//      the Free Software Foundation; either version 2 of the License, or
//      (at your option) any later version.
//  
//      This program is distributed in the hope that it will be useful,
//      but WITHOUT ANY WARRANTY; without even the implied warranty of
//      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//      GNU General Public License for more details.
//  
//      You should have received a copy of the GNU General Public License
//      along with this program; if not, write to the Free Software
//      Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//  
//  Also add information on how to contact you by electronic and paper mail.
//  
//  If the program is interactive, make it output a short notice like this
//  when it starts in an interactive mode:
//  
//      Gnomovision version 69, Copyright (C) year name of author
//      Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
//      This is free software, and you are welcome to redistribute it
//      under certain conditions; type `show c' for details.
//  
//  The hypothetical commands `show w' and `show c' should show the appropriate
//  parts of the General Public License.  Of course, the commands you use may
//  be called something other than `show w' and `show c'; they could even be
//  mouse-clicks or menu items--whatever suits your program.
//  
//  You should also get your employer (if you work as a programmer) or your
//  school, if any, to sign a "copyright disclaimer" for the program, if
//  necessary.  Here is a sample; alter the names:
//  
//    Yoyodyne, Inc., hereby disclaims all copyright interest in the program
//    `Gnomovision' (which makes passes at compilers) written by James Hacker.
//  
//    <signature of Ty Coon>, 1 April 1989
//    Ty Coon, President of Vice
//  
//  This General Public License does not permit incorporating your program into
//  proprietary programs.  If your program is a subroutine library, you may
//  consider it more useful to permit linking proprietary applications with the
//  library.  If this is what you want to do, use the GNU Library General
//  Public License instead of this License.
//  
//