Fixed bugs in Space.lookAt() and Matrix.top3x3.

- According to the doc, we had to call setLookAt and not lookAt.
- The top3x3 was considering a 4x4 matrix !!
- Also added code to support glsl version strings which contain more
that a number (i.e. « 330 core »).
- GraphMesh handles color.
- Fixed a bug where SGLJogl2ES2 would try to call
glTexImage2DMultisample which does not exist.