- Readded the near/farplane checks that were commented to make the affine camera matrix work

- added a clearBuffers() function, render() doesn't clear anymore
- Changed the ortho and projection matrices to conform to OpenGL

- Added documentation to the renderer of what's going on with the
projections
Renderer: Moved projectVertex to a free function
Now using the new projectVertex in apps
Removed 'using namespace' from generate-warping-data app
- Added getViewMatrix() and getProjectionMatrix() to the new Camera class

- encapsulated camera movement from the app into functions of the camera
- Updated axis-drawing in model-renderer-gui app