[HOpenGL] ANNOUNCE: GLUT 2.2.2.0

A new version of the GLUT package has been uploaded to Hackage. * Fixed linking issues on Mac OS X, the package should work out of the box without any warnings or additional flags now. * Handle additional mouse buttons via 'AdditionalButton Int' in the MouseButton type. * Made a few minor typing adjustments, which don't really matter for the type synonyms used for the basic OpenGL types so far, but which do matter for the upcoming datatype renamings for them. * Aesthetic improvements in the brick shader example. Cheers, S.