Version 0.8.0 - Pythonified!

The main application is now a Python 3 program. The C++ simulation code is wrapped into modules by Boost.Python, so there's no loss of performance. This is intended to be a first step toward a friendlier game-like interface.

Other changes include better robot behavior, especially when passing; the ability to qualify and race against robot cars; tire heating; and improved randomly-generated tracks.