Remove rating nudger.

1. Not providing additional ratings in the play store
2. Amazon is complaining about the embedded link to the play store.
Issue #172: Fix possible wrong context being retrieved from adapter

When in Poster view mode for TV Shows there is a possibility of the wrong
context being passed into the view or retrieved.  This fixes that issue.
Release 1.5.2
Set version to 1.5.3-SNAPSHOT
Issue #172: Allow app to auto start after boot complete

This adds the functionality to allow Serenity to auto start after the
boot sequence has completed on a device.  There is a new preference setting
that is set to false by default.  Enabling the setting will have Serenity
automatically launch after the new reboot of the device.