Adding a stub for the camera control screen.

Working on issue #93
Make the joystick class more general by creating a function to set the spring mechanism in both axis.
Adding output to camera functions.
Fix the RC override for camera control.
Merge branch 'master' into issue93_camera
Merge branch 'issue93_camera'

Add the camera screen to the master branch

Conflicts:
	DroidPlanner/res/values/strings.xml
	DroidPlanner/src/com/droidplanner/SuperActivity.java
Return the start screen to be the Flight Data screen