libspotify: Rewrite backend to use new API
libspotify: Rewrite backend to use new API

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