Issue #3 resolved
Add general extension stuff.
It would be useful to have some "library" extension files. Files that contain commonly used extensions. For example:
- ubiquitous: EXT_texture_filter_anisotropic and EXT_texture_compression_s3tc, and EXT_texture_sRGB.
- post_3_3: Core extensions from post GL 3.3 that are commonly available on GL 3.3 hardware. Includes ubiquitous.
- post_3_3_plat: As post_3_3, but also with some hardware-specific extensions (ARB_draw_buffers_blend on ATI hardware, etc). Includes ubiquitous.
- common_plat: Extensions common to many platforms that are useful in modern OpenGL (NV_texture_barrier, NV_copy_image, etc). Includes ubiquitous.
For WGL/GLX, there should be a few files for commonly used extension stuff.