rebased on top of current master
added playlists.py to makefile
added dialog for playlists selection.
added playlistdialog.ui
Some Add to Playlist Dialog cleanup

- Move some of the code into the ui file
- Fixed the renderer that doesn't show up
- Add missing window decorations
- Some code refactoring
Start editing New Playlist item on single click
add playlists controls ui
fix design
Update ui files from playlists branch in GNOME git

Updated files created by Eslam Mostafa
Cleanup class ordering
playlists: Add new method for getting path to a playlist
playlists: Add method for parsing playlists
view: Add songs list view to Playlists view
grilo: Check for grilo filesystem plugin
grilo: Add method to get a media object from uri
playlists: Use grilo to return media objects when parsing
grilo: Connect signals to registry first before loading plugins
playlists: Skip unexistent files
view: Load songs of playlist when selected
view: Monitor playlist songs