Fixing drawing camera. Minor API changes to camera matrices
separating drawing from matrix handling. It remains to properly rename
the classes
A full refactor of matrix stuff. Remains to fix setProjection/View in
Viewport class
fixing [][] madness and using *.fromRotatedBasis instead. Frame.matrix()
    and frame.fromMatrix() in ed like a charm ;) Remains to test
    Rot.fromRotatedBasis