TINYGL: fixed almost all the issues that arised after the refactoring.
TINYGL: Added a few utility methods and operators.
TINYGL: fixed an issue with vertices transformation and matrix-vector multiplication.
TINYGL: fixed a problem with shadows.
TINYGL: Done several optimizations to the maths code.
TINYGL: Done some optimization by moving the logic inside the class Matrix4.
TINYGL: Done some more optimization on maths code.
TINYGL: Last optimization batch, performance comparable to the previous version.
TINYGL: Changed the way vertices are transformed, increased performance (now it's comparable to the previous version and sometimes it performs even faster).
TINYGL: fixed an error in matrix transpose method and optimized the code a little bit more.
TINYGL: fixed minor formatting issues.
TINYGL: Modified changelog accordingly.