Find cython3 (ubuntu 13.10) and cython.py (Cython for python 3 on windows)
Move Canvas to example (this is not really part of the engine)
Refactoring (remove core and move signal to utils (renamed to system))
Add SFML sources (a bootstrap script will use them to build PyLudic on Windows and Linux)
Add a convenience bootstrap script (works on Ubuntu 13.10)