- Changed license to GPL

README.md

@@ -49,14 +49,19 @@ DISCLAIMER OF WARRANTIES. THE SOURCE SDK AND ANY OTHER MATERIAL DOWNLOADED BY LI
 
 LIMITATION OF LIABILITY. IN NO EVENT SHALL VALVE OR ITS SUPPLIERS BE LIABLE FOR ANY SPECIAL, INCIDENTAL, INDIRECT, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR ANY OTHER PECUNIARY LOSS) ARISING OUT OF THE USE OF OR INABILITY TO USE THE ENGINE AND/OR THE SDK, EVEN IF VALVE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 
-Natural Selection
-=================
-
+Natural Selection copyright and trademarks
+==========================================
 All artwork, sounds, audio, screenshots, text and code in Natural Selection, Zen of Sudoku, Spark engine and Natural Selection 2 are Copyright © 2014 Unknown Worlds Entertainment, Inc (http://www.unknownworlds.com).
 
 The mark Natural Selection was first represented in association with video-game software in June of 2001, and was first used in commerce around January, 2002. Natural Selection is Registered with the U.S. Patent and Trademark Office (No. 4,179,393).
 
-Uses external code and libraries
+Natural Selection license
+=========================
+See COPYING.txt for the GNU GENERAL PUBLIC LICENSE
+
+EXCLUDED CODE: The code described below and contained in the Natural Selection Source Code release is not part of the Program covered by the GPL and is expressly excluded from its terms. You are solely responsible for obtaining from the copyright holder a license for such code and complying with the applicable license terms.
+
+EXCLUDED CODE AND LIBRARIES
 - Half Life 1 SDK LICENSE (Copyright(C) Valve Corp.)
 - FMOD 3.7.5
 - LUA 5.0 (http://lua.org)