add album cover finder to background task
add album cover finder to background task

jhs-s/owncloud-music,Faldon/music,pellaeon/music,pellaeon/music,DavidPrevot/music,owncloud/music,Faldon/music,Faldon/music,paulijar/music,owncloud/music,paulijar/music,jhs-s/owncloud-music,DavidPrevot/music,uycarumba/music,Faldon/music,uycarumba/music,jhs-s/owncloud-music,pellaeon/music,uycarumba/music,owncloud/music,DavidPrevot/music,owncloud/music,Faldon/music,owncloud/music,paulijar/music,pellaeon/music,paulijar/music,paulijar/music,uycarumba/music,DavidPrevot/music