some cleanup
Changes for Traffic Light Drawing
Simulate Cars
Merge branch 'dg-drawing'

Conflicts:
	src/ch/bfh/proj1/trafficlightsimulator/Lane.java
	src/ch/bfh/proj1/trafficlightsimulator/SimPanel.java
	src/ch/bfh/proj1/trafficlightsimulator/Street.java
	src/ch/bfh/proj1/trafficlightsimulator/TrafficLightSimulator.java