fix Album Artist not showing on SongsFragment

fixes #626
Collapsed Albums: add setting
Collapsed Albums: add strings

Conflicts:
	MPDroid/src/main/res/values-de/strings.xml
Collapsed Albums: add PlaylistAlbum
Collapsed Albums: add size() and hasText() to AbstractPlaylistMusic
Collapsed Albums: add CollapsedPlaylistFragment
Collapsed Albums: use CollapsedPlaylistFragment

Conflicts:
	MPDroid/src/main/java/com/namelessdev/mpdroid/MainMenuActivity.java
	MPDroid/src/main/res/layout-land/main_activity_nagvigation_tablet.xml
	MPDroid/src/main/res/layout/main_activity_nagvigation.xml
	MPDroid/src/main/res/layout/main_activity_nagvigation_tablet.xml
make playlist text autoscroll
make header in SongsFragment autoscroll
make Songs in SongsFragment autoscroll
autoscroll in albumfragment -- partially

Conflicts:
	MPDroid/src/main/java/com/namelessdev/mpdroid/views/AlbumDataBinder.java
show disc and track number in NowPlaying