Add additional support for unregistering listeners in ShadowSensorManager
Add ShadowIntentService
Add tests for ShadowIntentService
Add "is "accessor to referenceCounted in ShadowWakeLock

- Also make getLatestWakeLock static since you don't need an instance.
- Add the ShadowWakeLock to the shadowOf method list.
Add test for ShadowWakeLock
Merge pull request #740 from nimeacuerdo/master

Add additional support for unregistering listeners in ShadowSensorManager
Merge pull request #741 from SuperJugy/ShadowIntentService

Shadow intent service
Merge pull request #742 from SuperJugy/ShadowWakeLock

Add "is "accessor to referenceCounted in ShadowWakeLock