added delay
added several metrics to expression viewer activity, created sensor
viewer activity and added several metrics.
added SensorviewerActivity
fixed bug sensor viewer activity showing same sensor multiple times
Merge remote-tracking branch 'origin/cross-device' into elie

Conflicts:
	src/interdroid/swan/engine/EvaluationEngineService.java
	src/interdroid/swan/engine/QueuedExpression.java
	test/interdroid/swan/test/TestActivity.java
Merge remote-tracking branch 'origin/elie' into cross-device

Conflicts:
	swan-in-your-app/swan-song.jar
	swan-sensor-in-your-app/swan-song.jar