Made Keyboard.poll behave like win32 version
fix: <al.h> -> <AL/al.h>
Dump extension info with debug library
Added releaseContext to BaseGL.java (and native for linux)
Added keycode mapping for enter and tab in Keyboard.java
Remapped some keys
Moved OpenAL to common
Moved AL utility files to common
Moved GLU.cpp to common
Moved org_lwjgl_opengl_GL.cpp to common (again)