| ␉␉    GNU GENERAL PUBLIC LICENSE␊ | 
| ␉␉       Version 2, June 1991␊ | 
| ␊ | 
| Copyright (C) 1989, 1991 Free Software Foundation, Inc.␊ | 
| 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  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␊ |