Rendering Vector Art OpenGl References: * https://www.youtube.com/watch?v=K5u8ZZBWSdw * http://http.developer.nvidia.com/GPUGems3/gpugems3_ch25.html * http://research.microsoft.com/en-us/um/people/cloop/loopblinn05.pdf * https://github.com/openframeworks/openFrameworks/issues/1190