Lightweight Java Game Library Code

PBO/VBO checks now query OpenGL directly instead of keeping track of the currently bound buffers

Win32: Removed stale declaration from display.h

Win32: Moved getGammaRampLength to java side

Win32: Moved handleMessages to java side (update())

New EXT_framebuffer extensions

Win32: display.c: Make initDisplay use the same API as getAvailableDisplayModes

Win32: Adder createDisplayMode helper function to display.c

Win32: Removed unused cruft from display.c

Win32: Zero out the devmode struct in display.c

Win32: Commented multi-monitor stuff out from display.c, since we don't really support multiple monitors anyway. Now we only operate on the default (DISPLAY_DEVICE_PRIMARY_DEVICE) device, which should scale to multi monitor setups. Needs thorough testing, of course.