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 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

Added EXT_timer_query extension
Added support for long (int64) types

Widened VBO/PBO buffer offsets and sizes to long to better match the GLsizeiptr and GLintptr native types

Removed unsued JNIEnv parameter from extgl_QueryExtension

Win32 part of refactor and AWTGLCanvas

Moved platform specific opengl extension flags into the platform specific files

Implemented generator support for per-context function pointers. Fixed NV_vertex_array_range

Mac OS X: platform specific GL types in extgl.h