[Merge] lp:~phablet-team/media-hub/bg-playlists-vivid into lp:media-hub/stable

[Jim Hodapp]

Jim Hodapp has proposed merging lp:~phablet-team/media-hub/bg-playlists-vivid into lp:media-hub/stable.

Commit message:
* Connected the TrackList signals on the stub side
* Make has_next() more reliable
* Make next() and previous() work better
* Fix various bugs that arose from testing the TrackList code

Requested reviews:
  Ubuntu Phablet Team (phablet-team)

For more details, see:
https://code.launchpad.net/~phablet-team/media-hub/bg-playlists-vivid/+merge/266765

* Connected the TrackList signals on the stub side
* Make has_next() more reliable
* Make next() and previous() work better
* Fix various bugs that arose from testing the TrackList code
-- 
Your team Ubuntu Phablet Team is requested to review the proposed merge of lp:~phablet-team/media-hub/bg-playlists-vivid into lp:media-hub/stable.
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