updated sensors
Merge branch 'master' of https://github.com/CMU-Robotics-Club/RoboBuggy

Conflicts:
	surface_src/java_src/Alice/src/com/roboclub/robobuggy/main/Robot.java
	surface_src/java_src/Alice/src/com/roboclub/robobuggy/main/config.java
	surface_src/java_src/Alice/src/com/roboclub/robobuggy/sensors/Encoder.java