Misc Update #2

-Renamed GLUtils to RenderUtils
-Added untested skybox code
-Recoded States for new Gui stuff
-Removed random crap from IPhysicsEntity
-Working Midi volume code
-Gui classes for Title and Splash screens
-Moved Gui lists and Camera to State class
-Placeholder Title screen and Splash screen images
-Sun, moon, and star textures for skyboxes
Quick Fix #1

-Updated RenderUtils to use currentState's Camera instead of the
nonexistent one in Crusader