Light poller class with methods for odometery correction

deltaLightValue() returns the change in light values over one period
line() returns a boolean whether or not the robot is on a line
based on when the change in light values changes sign (only occurs once
on the line)
Navigation with odometry correction

Still has RConsole statments in it
Corrected trigonometry problems in code
TwoWheeledRobot with odometry correction methods
Merge branch 'master' of https://github.com/bernardkaminski/DPM_FALL_2013_Team2

Conflicts:
	LightPoller.java
	Navigation.java
	TwoWheeledRobot.java