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
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
moved the order of the controls on the playback audio view to mimic that of the bottom bar
modified the default bottom bar view so that it will always show the playlist button
added a large cover art placeholder image and fixed a layout issue with the audio playback view
fixed an issue where the audio/video partial view of the playback view would not show sometimes (probably bug in caliburn)