OpenGL Header now up to 2.0

[Sascha Willems]

The german Delphi OpenGL Community released an updated version of their OpenGL header, which now supports all functions from the core of OpenGL 2.0. Though those could be already used with the previous header, they now are named to fit the core specifications (core functions don't have the suffix ARB, EXT, etc.).
Besides this, some (old and new) extensions have also been added, namely WGL_ARB_pixel_format_float, GL_EXT_stencil_clear_tag, GL_EXT_texture_rectangle and GL_EXT_texture_edge_clamp.

[technomage]

This is great news. We need to get the headers in JEDI-SDL up to date now