fixed play on new track because of playback view model double register
Merge pull request #32 from balauru/fix_play

fixed play on new track because of playback view model double register
[BugFix] When user inputs service url without ending slash, it will be a valid address
The bottom app bar will be hided when user navigates to Playback View Model
Added subsonic logos
tried a fix for playback view model not binding
Merge pull request #33 from pirvudoru/ServiceUrlNotWorkingWhenEndingSlashIsMissing

ServiceUrlNotWorkingWhenEndingSlashIsMissing
Merge pull request #34 from pirvudoru/HideBottomBarWhenNavigatinToPlaybackViewModel

lHideBottomBarWhenNavigatinToPlaybackViewModel
Merge pull request #35 from pirvudoru/SubsonicLogos

Subsonic logos
Merge pull request #36 from balauru/48_playback_view_model

tried a fix for playback view model not binding
merged the 2 overrides of OnActivate from playback view model
The Go To Playlist button is hidden when on PlaybackViewModel
Merge pull request #37 from pirvudoru/HideListButtonFromPlaybackVIewModel

Hide list button from playback view model
added the playlist management service and moved some of the logic from playback view model to it. Also removed/added some event aggregator messages to better handle the playback workflow

added the ability to save a playlist by serializing the items in it
added the ability to load a saved playlist
Merge branch 'saveLoadPlaylist#63'

Conflicts:
	Client/Playback/PlaybackViewModel.cs
fixed some merge issues