FPS Limit Fix

FPS Limit Fix

Improved FPS limiting for Minecraft Beta 1.7.3 running on the Ornithe Toolchain.

Details

Changes the Power Saver limit from 40 to 60 instead, as this is a more common refresh rate.
Ensures the Balanced limit of 120 FPS is actually adhered to, instead of resulting in no limiting.

Additionally, the built-in FPS limiter is replaced with a vastly superior implementation provided by LWJGL.