[Merge] lp:~phablet-team/media-hub/mpris-take-2 into lp:media-hub/stable

[Alfonso Sanchez-Beato]

Bugs created to track the "TODO" comments:

https://bugs.launchpad.net/ubuntu/+source/media-hub/+bug/1498962
https://bugs.launchpad.net/ubuntu/+source/media-hub/+bug/1498961

Re: the trace in reset_current_player() I prefer to keep it so it is symmetrical with the one in set_current_player(). These traces are not printed very frequently and are quite useful for debugging as they happen in kind of critical moments.
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https://code.launchpad.net/~phablet-team/media-hub/mpris-take-2/+merge/271942
Your team Ubuntu Phablet Team is requested to review the proposed merge of lp:~phablet-team/media-hub/mpris-take-2 into lp:media-hub/stable.