dvberkel/sumofus2012 — pull request #4 by fractic (2012-07-18 19:09:25+00:00)
Title: Non player car functionality

I've added non player cars to the game.
* npc traffic is automatically kept one unidirectional.
* roads and crossings can have one-way or two-way npc traffic.
* npc cars can be added on a track and the track can advance them.