add Smoking-Guns-1.0 license

licenses/Smokin-Guns-1.0

++===============================================================+
+Smokin' Guns LICENSE v1.0
+http://www.smokin-guns.net/
++===============================================================+
+
+All files herein excluding binary executables for the game engine
+are provided to you with the following requirements:
+
+* All content, unless explicitly stated by official or bundled
+  documentation is to be only distributed with the project.
+
+* No file may be relicensed unless described in documentation
+  as being under an OSI-approved license that allows such
+  relicensing. [1]
+
+* You may not incur costs for users downloading this package.
+
+* You may only incur a fee of media cost for burned copies and
+  respective shipping cost.
+
+* You have no right to reverse engineer, copy, disassemble or
+  modify bsp files. [2]
+
+* You have the right to copy, use, modify, distribute, and add
+  to the engine code as long as you respect the terms of the GPL
+  v2. [3]
+
+* The bundled installer and zip files will have their md5
+  checksum published on the official website to protect users
+  from repackaged versions.
+
+* Do not redistribute any file separate unless there is explicit
+  instruction that says you may do so.
+
+* The official files may be hosted on internet servers but may
+  not be tampered with, and must match the md5 checksum.  Please
+  contribute if you want to add features.
+
+Copyright Attribution:
+(c) 1999-2005 Id Software
+(c) 2000-2003 Iron Claw Interactive
+(c) 2005-2009 Smokin' Guns Productions
+
++===============================================================+
+[1] Public Domain, MIT, BSD typically do, while copyleft (GPL)
+     does not.
+
+[2] Some items may have corresponding .map files available for
+     use with a level editor such as Radiant, but each file
+     released will have its own accompanying restrictions as
+     decided by the author.  Creative Commons by-nc-sa applies to
+     most but not all raw artwork, so be careful with assuming
+     what files are licensed with.
+
+[3] Engine source is available at:
+     http://www.sourceforge.net/projects/smokinguns on SVN.
+
+[4] Windows build uses custom replacement files to avoid bugs
+     introduced by OpenAL sound API merge and new file handling
+     method.  These files are available in a zip file on
+     SourceForge or may be sent by request (sparcdr@users.sf.net).
+     Linux/UNIX uses revision 38 only and should not need further
+     fixes.
\ No newline at end of file