Updated CONTRIBUTING & CREDITS

git-svn-id: http://svn.net-core.org/repos/t-engine4@919 51575b47-30f0-44d4-a5cc-537603b46e54

 I (Nicolas Casalini), gladly accepts contributions to the engine code either
 bugfixes or new features (although I feel no obligations to accept them all).
 
-To contribute
+To contribute I'll ask people that contribute to release copyright to me,
+or to give me right to relicense the code as I see fit .
+(You can add a "as long as its opensource" if you wish, it'll never change :)
+
+The reason for that is to avoid the headhache that angband had with it's
+free-but-not-modern licence. This way if a better licence pops up I can
+use it easily without having to hunt everybody that contributed and that
+might have since then disappeared.
+
+Thanks
\ No newline at end of file

@@ -5,6 +5,9 @@ General:
 - Neil Stevens for a Mac build
 - Brian Jeffears for texts revisions
 - Ralph Versteegen for texts revisions
+- Shani for various code
+- Antagonist for OpenGL support and opengl shaders
+- Reenen Laurie for work on the musics, locating and choosing them
 
 Graphics:
 - David Gervais tiles