Adding first files, we are still working on it, we didn't compile anything.
TODO list:
- Add the Makefile to compile everything.
- Finish the MultiGrid class (we are working on the build method, from the given CellStructInfo).
- Add some unit tests to check that everything works fine (before finishing all the other methods, TDD).
- Do some benchmarking to test the performance against other implementations like QuadTree or BSP.