Comment~
Integrate addToLocalCatalogCommand for remote song
Comment
Integrate DownloadMusicsCommand
Add a progress indicator
Show the owner login for remote songs
Remove the "All songs" button,

We can't retrieve easily all the songs shared on the network.
Tweak the UI a bit

Fix the hbarPolicy problem & use a HBox instead of a flow pane
Merge branch 'master' into ui
Merge branch 'ui'