Move __stdcall into the parens for function pointer definitions.

MSVC 2010 appears to require that it be located there.
Don't forget to install the wgl headers.

Fixes #26
Import registry from SVN 26622
Merge branch 'khronos-registry'
Bump version to 1.2 for release.
Adds support for Android.

This has been tested with both OpenGL and OpenGL ES on Android.
We can't use dlsym on Android to get all the function pointers since Android's libGLES* libraries are just shim libraries that pass everything through
to the real vendor specific libraries.

Due to this we must grab function pointers entirely through eglGetProcAddress instead of dlsym.