#11 Testing framework

[Mike C. Fletcher]

Need to work on creating an automated testing framework
for PyOpenGL. This should allow for testing the
various context modes with test code snippets and
possibly comparing results with expected-results
bitmaps (taking into consideration that OpenGL doesn't
guarantee pixel-perfect reproduction AFAIK).

At the least the code should be able to run every
method in the library just to see if they blow up.