Moved broadcast receivers into individual files.
Added explicit _verbose setting to broadcast receivers.
Removed unused variable.
Use new intents for Spotify broadcast receiver.

Also correctly pass around the _verbose setting.
Updated project and solution configuration.

Small changes made by Xamarin Studio.
Added broadcast receiver for Pocket Casts.

Unfortunately, as indicated in the comments, this broadcast receiver is
never used, as it uses the default intents.  It also does not properly
set the "playing" extra, so plays are not recorded.  I am uncomfortable
with the idea of extra engineering to handle Pocket Casts specifically
in the generic broadcast receiver.