audio: Cleanup playlists elements docs and interace.
audio: Cleanup playlists elements docs and interace.

diandiankan/mopidy,ali/mopidy,bencevans/mopidy,rawdlite/mopidy,hkariti/mopidy,vrs01/mopidy,priestd09/mopidy,quartz55/mopidy,quartz55/mopidy,priestd09/mopidy,adamcik/mopidy,SuperStarPL/mopidy,jcass77/mopidy,jmarsik/mopidy,kingosticks/mopidy,abarisain/mopidy,jodal/mopidy,woutervanwijk/mopidy,tkem/mopidy,liamw9534/mopidy,pacificIT/mopidy,jcass77/mopidy,mokieyue/mopidy,ZenithDK/mopidy,diandiankan/mopidy,bacontext/mopidy,hkariti/mopidy,mokieyue/mopidy,dbrgn/mopidy,jodal/mopidy,dbrgn/mopidy,vrs01/mopidy,ZenithDK/mopidy,liamw9534/mopidy,rawdlite/mopidy,ali/mopidy,jcass77/mopidy,quartz55/mopidy,jmarsik/mopidy,bencevans/mopidy,priestd09/mopidy,tkem/mopidy,adamcik/mopidy,kingosticks/mopidy,bacontext/mopidy,tkem/mopidy,pacificIT/mopidy,woutervanwijk/mopidy,jmarsik/mopidy,glogiotatidis/mopidy,pacificIT/mopidy,glogiotatidis/mopidy,swak/mopidy,swak/mopidy,mokieyue/mopidy,SuperStarPL/mopidy,swak/mopidy,glogiotatidis/mopidy,ZenithDK/mopidy,glogiotatidis/mopidy,vrs01/mopidy,swak/mopidy,ali/mopidy,rawdlite/mopidy,quartz55/mopidy,hkariti/mopidy,bencevans/mopidy,SuperStarPL/mopidy,bacontext/mopidy,rawdlite/mopidy,mopidy/mopidy,adamcik/mopidy,dbrgn/mopidy,mokieyue/mopidy,jodal/mopidy,pacificIT/mopidy,hkariti/mopidy,SuperStarPL/mopidy,ZenithDK/mopidy,jmarsik/mopidy,bacontext/mopidy,mopidy/mopidy,mopidy/mopidy,diandiankan/mopidy,abarisain/mopidy,bencevans/mopidy,tkem/mopidy,diandiankan/mopidy,dbrgn/mopidy,ali/mopidy,kingosticks/mopidy,vrs01/mopidy