mpd:Update protocol to 0.19
mpd:Update protocol to 0.19

Update tests to reflect new function names

adamcik/mopidy,bacontext/mopidy,ZenithDK/mopidy,vrs01/mopidy,hkariti/mopidy,diandiankan/mopidy,mokieyue/mopidy,vrs01/mopidy,pacificIT/mopidy,tkem/mopidy,kingosticks/mopidy,vrs01/mopidy,bencevans/mopidy,ali/mopidy,quartz55/mopidy,quartz55/mopidy,jcass77/mopidy,tkem/mopidy,diandiankan/mopidy,dbrgn/mopidy,tkem/mopidy,adamcik/mopidy,adamcik/mopidy,jmarsik/mopidy,bencevans/mopidy,tkem/mopidy,mokieyue/mopidy,swak/mopidy,mopidy/mopidy,mokieyue/mopidy,hkariti/mopidy,bencevans/mopidy,quartz55/mopidy,hkariti/mopidy,ZenithDK/mopidy,swak/mopidy,dbrgn/mopidy,hkariti/mopidy,SuperStarPL/mopidy,bacontext/mopidy,SuperStarPL/mopidy,pacificIT/mopidy,pacificIT/mopidy,jodal/mopidy,diandiankan/mopidy,jmarsik/mopidy,jodal/mopidy,ali/mopidy,pacificIT/mopidy,jcass77/mopidy,swak/mopidy,jcass77/mopidy,kingosticks/mopidy,dbrgn/mopidy,bacontext/mopidy,mokieyue/mopidy,quartz55/mopidy,ali/mopidy,mopidy/mopidy,SuperStarPL/mopidy,kingosticks/mopidy,SuperStarPL/mopidy,dbrgn/mopidy,bacontext/mopidy,jmarsik/mopidy,jodal/mopidy,ZenithDK/mopidy,ali/mopidy,vrs01/mopidy,bencevans/mopidy,jmarsik/mopidy,diandiankan/mopidy,swak/mopidy,ZenithDK/mopidy,mopidy/mopidy