Add license.

License.txt

@@ -0,0 +1,15 @@
+All source code included with this distribution, unless declared otherwise, 
+is commercial GSC Game World proprietary code. 
+
+Redistribution and use in source and binary forms, with or without 
+modification, are permitted provided that the following conditions are met: 
+
+1. Redistributions of source code must retain the above copyright notice, this 
+list of conditions and the following disclaimer. 
+
+2. Redistributions in binary form must reproduce the above copyright notice, 
+this list of conditions and the following disclaimer in the documentation 
+and/or other materials provided with the distribution. 
+
+3. Neither binary nor source code redistributions may be used for any 
+commercial purposes.