-Fixed NPE when playlist fragment is destroyed while renaming.
-Fixed remote playlist thumbnail to use uploader avatar when thumbnail url is unavailable.
-Added dispose on exit to all database requests in local playlist fragment.
-Added LeakCanary as part of debug build.
-Modified bookmark list to show both remote and local playlists.
-Removed ability to save channel items as local playlist, in favor of subscribe.
-Removed stream id from playlist stream join table since only foreign constraint is needed.
-Added bar to playlist control UI.
-Modified local playlist fragment to no longer save when out of focus.
