Added first view to the activity
settings: enabled project specific errors and warnings
Presentation: First pass on NowPlayingActivity
Presentation, Model: Added track scrolling and album icon
Model: added startPlayback to IPlayer
Model, presentation: extracted Widget and Notification presenters

Added TODOs
Merge remote-tracking branch 'remotes/origin/now_playing_activity' into develop
Merge branch 'model_extraction' into develop

Conflicts:
	src/com/android/music/simple/model/IPlayer.java
	src/com/android/music/simple/model/NullPlayer.java
	src/com/android/music/simple/model/PlayerProxy.java
	src/com/android/music/simple/model/PlayerService.java
Revert "Comment out RemoteControlClient code during API change"

This enables lock screen controls

This reverts commit 94ed2422b691e1822783d696bc5acdecf222fe12.

Conflicts:
	src/com/android/music/MediaPlaybackService.java
Model, presentation: created RemoteControlService
Presentation: prepared Notification and Widget presenters
Model: added missing events
Merge branch 'remote' into develop