Extreme Updates

- Cleaned repeated code and fixed code structure
- Added support for MathJax (also made it work for done examples)
- Fixed vector brackets - started making support for matrix look with
hover, changing values abilities ...a.s.o... (still big problems in
IE10... ) => also looked for solution with MathJax, but not working with
svg font rendering....
- Classes renamed (vector.js -> vector3.js ... a.s.o. ...)
- First look of matrix3.js class (matrix4.js already work in progress)
- .... and again some cosmetic visual changes

TODO:
- Vector4.js, Matrix4.js, Camera.js, View.js, World.js, .... a.s.o. ...