Carcode improvements

Since last post I have already make good advances with carcode, collision is now working, I started using the Separating Axis Theorem (SAT) for collision, it works with boxes but it will be extended to polygons and other figures later on.

Also I have enabled car scripting, I did a small demo where you have a path and 2 sensors, the script uses sensor information to try to follow the path, it is a very simple script, it just steers the car according sensor data.

A few new entities have been added for level scripts, such as Box and Text, there is the object Console where you can write some text to the screen.

Currently I'm working on windows support, fixing things here and there and improving py2exe support which works pretty well (unless you install pyOpenGL 3.0). I have implemented game pause.

Next step will be providing packages for any brave testers :), improve collision detection, improve car scripting, create levels, improve UI.