stash elbow raise
added correct motion state monitoring
Merge branch 'develop' into feature/elbow_raise

Conflicts:
	iOS/PTMotion.xcodeproj/project.pbxproj
	iOS/PTMotion/Base.lproj/Main.storyboard
	iOS/PTMotion/View Controllers/PTElbowFlexionViewController.m
	iOS/PTMotion/View Controllers/PTForearmSupinationViewController.m
Merge branch 'feature/elbow_raise' into develop