* Added JSON datafiles for TV shows and music videos
* Implemented instrumentations tests for MoviesActivity, MusicActivity,
TVShowActivity, and AddonsActivity.
* Moved RestoreSearchQueryViewPagerTest to music package as it uses
the MusicActivity
* Moved RestoreSearchQueryListFragmentTest to movies packages as it
uses the MoviesActivity
* Added scripts to get JSON data for music videos, addons, and TV shows
* Added sequence diagram for BaseMediaActivity to clarify new setup
* Refactored BaseMediaActivity to comply with diagram
* Refactored SyncMusicVideos and SyncTVShows so we can use the same code
for adding test data as we use for adding real data.
* Removed unused StringBuffer and synchronize block in MockTcpServer
* Song lists for artist, album, and overall now shows the artist name for each individual song
* Added display artist column to songs table. This required a DB upgrade and users should
do a refresh for music items to be able to see the display artist in the song lists.
This applies the fix for issue #219 Incomplete libraries for movies and
TV shows.
For music items this was already fixed in PR #236
See commit 7330f85241
Using Kodi's JSON RPC, Kodi may return less items than requested, even
if there are more items available. The old method of determining if
more items are available by checking if the amount of items returned
equals the amount requested does not work in these cases. Therefore,
we now use the returned List.LimitsReturned to determine if there are
more items available. If List.LimitsReturned.end equals
List.LimitesReturned.total we assume we retrieved all items.