UI added to <Orientation>
sensor_status_unreliable check removed

Signed-off-by: julia-altenbuchner <julia.altenbuchner.11@ucl.ac.uk>
Merge branch 'master' of https://github.com/ExCiteS/Sapelli

Conflicts:
	CollectorAndroid/src/uk/ac/ucl/excites/sapelli/collector/control/CollectorController.java