Many bug fixes and changes, please see the changelist fro 1.4 -> 1.5
Fixing an issue where VideoCastControllerActivity would show loading progressbar
If user started castinga video but lock the screen before playback started and
after playback started unlock the device, the loading progressbar was staying on the
screen.
Merge branch 'master' of https://github.com/googlecast/CastCompanionLibrary-android

Conflicts:
	src/com/google/sample/castcompanionlibrary/cast/VideoCastManager.java
	src/com/google/sample/castcompanionlibrary/notification/VideoCastNotificationService.java