Extend LineFollower by a differential control component
Extend LineFollower to detect a lost line and undo its last commands
Refactor numerical setpoint value into static final variable
Add preliminary line finding algorithm
Merge branch 'master' into line-follower
Use available methods to control head and add some javadoc
Merge branch 'master' into line-follower

Conflicts:
	src/strategies/LineFollowerStrategy.java
Merge remote-tracking branch 'origin/master' into line-follower
Update LineFinder to use new Head API
Merge remote-tracking branch 'origin/master' into line-follower
Merge branch 'master' into line-follower
Rework and fine tune line finder
Merge branch 'master' into line-follower
Drop more dark samples than bright samples during LightCalibration
Adjust LineFollower control parameters
Do not center Head during initialization
Use running average to improve undo/stopping behaviour of LineFollower
Merge branch 'line-follower'