Clean ToS implementation.

• Add clean Tree of SHapes implementation.
• Add tests (close #4 (closed))
• Add Support for 3D case.
• Update doc

Missing

Some broken stuff in apps has to be cleaned (WIP) #8

Build

http://buildfarm.lrde.epita.fr/project.html?projectId=Olena_Pylene&tab=projectOverview&branch_Olena_Pylene=development%2Ftos