Add install instruction
Update requirements (those requirements are for Linux only, ATM the engine only run on GNU/Linux)
Update README.rst
Merge branch 'master'
Make sfml a single module
Adapt examples
Move logger, Signal, and helpers in their own module + add load_from_stream methods.
move pyqt4 canvas to the root of the sources
Adapt example
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)
Boostrapper: install use the mode arg
A few improvements to the bootstrapper
Add comments + a few improvements
A few more improvements
Remove tools package
Define python3 as the intended interpreter