Lightweight Java Game Library Code

ReferencesStack now clears references when popping to avoid keeping buffer references around too long

Linux: Don't free already freed XIC and XIM instances in LinuxKeyboard

Linux: Remove 32x32 icons size check, since other sizes seem to work alright. Document the fact that Display.setIcon use the icons from the icon array in order of decreasing preference

Make sure OpenGL versions with major >= 3 is properly supported. Make sure major >= 1 in any case

Fix comment

Windows: Ingore DI_POLLEDDEVICE when setting buffer size of a directinput device

glu: Remove unused Util.IntValue inner class

glu: Remove redundant initialization of PixelStoreState

Windows: Don't use a non-portable anonymous struct in contex.h

Windows: Moved NativeSysImplementation.java to WindowsSysImplementation.java and moved some native code to java.