Lightweight Java Game Library Code

Added support for OpenGL 3.2 and the following extensions: AMD_draw_buffers_blend, ARB_depth_clamp, ARB_draw_buffers_blend, ARB_draw_elements_base_vertex, ARB_fragment_coord_conventions, ARB_provoking_vertex, ARB_sample_shading, ARB_seamless_cube_map, ARB_shader_texture_lod, ARB_texture_cube_map_array, ARB_texture_gather, ARB_texture_multisample, ARB_texture_query_lod, ARB_vertex_array_bgra, EXT_separate_shader_objects, EXT_texture_snorm, NV_copy_image, NV_parameter_buffer_object2.

Windows: Handle missing va_copy macro in MSVC

Made sprintfJavaString handle arbitrary length strings and reduce stack usage

Windows 64: Enabled lwjgl64.dll and fixed crash

windows compile fixes

extgl.h should use definitions from the BSD licensed Mesa gl.h and glext.h instead of the original SGI gl.h/glext.h to avoid the SGI license

missing special handler for ALC_ALL_DEVICES_SPECIFIER

Added platform specific getJNIVersion implementations

NewStringNativeUnsigned should return NULL if argument string is NULL

Removed unused native function getJVM()