Support the GL Core Profile on OS X.  Do not use glew on OS X.
CMake lists and modules support OS X.
Workaround an issue with makefile generation on OS X.

Workaround an issue where the generated makefile may not include the
necessary flags for finding Awesomium.
Add OS X installation instructions to the ReadMe.
Merge pull request #70 from DeVaukz/glfw

Add support for building and running on OS X.