Minor: GL_CLAMP_TO_EDGE defined when OpenGL >= 1.2.        Screen.get_framerate() partly implemented.        Screen.size attribute linked to constant_parameters.size using __get__        Various minor comment changes.
Minor: GL_CLAMP_TO_EDGE defined when OpenGL >= 1.2.
       Screen.get_framerate() partly implemented.
       Screen.size attribute linked to constant_parameters.size using __get__
       Various minor comment changes.


git-svn-id: 033d166fe8e629f6cbcd3c0e2b9ad0cffc79b88b@1045 3a63a0ee-37fe-0310-a504-e92b6e0a3ba7

visionegg/visionegg,visionegg/visionegg,visionegg/visionegg,visionegg/visionegg,visionegg/visionegg