Maths Code Refactoring

This pull request represents the completion of the first deliverable of my Google Summer of Code project.
I managed to refactor all the maths code in a c++ style while mantaining the same level of performance.
If you have any questions or doubts please ask.
I am removing that, it was because of a refactoring I did precedently which ended up being removed (but left those)
Thanks for letting me know that