Fixed GetShader & GetProgram
OpenAL: Moved more library loading from native to java
Win32: Fix Pbuffer creation
Win32: typo fix in Pbuffer.c
Win32: Fix type in exception message in context.c
Win32: Handle context-dependent wgl extensions
Linux: Handle different GLX capabilities on different screens
Win32: Compile fix
Removed unsued JNIEnv parameter from extgl_QueryExtension