Movement + Collision (20.02.2014)

I finally had time to work on the movement and collisions of the pawns.
It works fairly well, just have some few problems when all of the pawns
tries to get to the same place. They seem to teleport sometimes to
avoid collision.

Next step : Path following.

PS: I also made a Windows version with Visual Studio 2010, because I
had some problems with my Macintosh. That version is not going to
progress though.