- reinstated the far superior assembly HQnX version for Visual C++.
- replaced GLEW with GLLoadGen for GL access. This allows to have a header that only contains what's actually required, namely OpenGL 3.3 plus glBegin and glEnd which are the only compatibility functions needed for the fallback render path.

GLEW has two major problems:

- it always includes everything, there is no way to restrict the header to a specific GL version
- it is mostly broken with a core profile and only works if all sanity checks get switched off.
-we need this, too.
- disabling inlining in the GL loader produces an executable that's 8kb smaller.