Moved disabling of repeat rate to Display
Disable linux key repeat while Keyboard is created - match win32 behavior
Tweaked but little else
fix: removed GlobalRef fix: now sets fields to JNI_TRUE/JNI_FALSE respectively
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wip fix: buttons array now being ref'ed from native side to avoid GC'ing
added glXAllocateMemoryNV/glXFreeMemoryNV
fix: won't be needing hashmaps from native side