A couple of minor bug fixes
See changelist for 1.1 -> 1.2 for a complete list of changes
Updating to Google Play service 4.3
Fixing a minor bug (#31)
Fixing a number of bugs
- Fixing issue 32
- Fixing issue 33
- Adding a better BaseCastManager.clearContext() variation
- Implementing enhancement 30
- Making sure play/pause button is hidden when ProgressBar is shown in VideoMediaRouteControllerDialog
- probably some more adjustments and bug fixes
Clearing cached session if when disconnecting
Fixing the VideoCastManager.getMediaDuration() that was missed in an earlier commmit
 * Adding MediRouteButton, moving some values to resource for MR dialog and Mini Controller and some more...
 * Added support for MediaRouteButton
 * Added "alias" resources for Mini Controller play/pause/stop buttons so clients can customize them easily
 * Added a color resource to control thw color of the title of the custom VideoMediaRouteControllerDialog
 * Updated documentation
 * Fixed some typos in JavaDoc
Minor change
Making VideoCastControllerActivity's UI a tiny bit more general

Now, if needed, developers can define an ImageView for the background image instead of the previous
background that was used for the layout. To do so, copy the cast_activit.xml from res/layout
to your own res/layout and update that by:
- add an ImageView
- remove the android:id="@+id/pageView" from the RelativeLayout and put it on your ImageView.
The rest will just work.