replaygain: calculate when any file needs calculation
replaygain: calculate when any file needs calculation

This ensures accurate album-level data. It also fixes a problem with the old way
of doing things where the MediaFiles and tool results would become misaligned if
a subset of the tracks needed recalculation.

randybias/beets,ibmibmibm/beets,Kraymer/beets,drm00/beets,xsteadfastx/beets,shanemikel/beets,swt30/beets,drm00/beets,mathstuf/beets,SusannaMaria/beets,mried/beets,marcuskrahl/beets,tima/beets,asteven/beets,kareemallen/beets,swt30/beets,ruippeixotog/beets,multikatt/beets,moodboom/beets,shamangeorge/beets,sadatay/beets,xsteadfastx/beets,mosesfistos1/beetbox,lengtche/beets,andremiller/beets,lightwang1/beets,parapente/beets,diego-plan9/beets,mathstuf/beets,shamangeorge/beets,bj-yinyan/beets,PierreRust/beets,YetAnotherNerd/beets,multikatt/beets,kareemallen/beets,tima/beets,jbaiter/beets,Andypsamp/CODfinalJUNIT,Kraymer/beets,jmwatte/beets,Kraymer/beets,moodboom/beets,MyTunesFreeMusic/privacy-policy,jackwilsdon/beets,beetbox/beets,mathstuf/beets,randybias/beets,imsparsh/beets,untitaker/beets,shanemikel/beets,parapente/beets,PierreRust/beets,Dishwishy/beets,andremiller/beets,PierreRust/beets,arabenjamin/beets,Dishwishy/beets,xsteadfastx/beets,beetbox/beets,bj-yinyan/beets,lightwang1/beets,jmwatte/beets,artemutin/beets,randybias/beets,MyTunesFreeMusic/privacy-policy,ibmibmibm/beets,ttsda/beets,jayme-github/beets,ibmibmibm/beets,sampsyo/beets,Andypsamp/CODjunit,ttsda/beets,jayme-github/beets,SusannaMaria/beets,pkess/beets,diego-plan9/beets,ttsda/beets,lengtche/beets,shamangeorge/beets,krig/beets,Freso/beets,krig/beets,gabrielaraujof/beets,m-urban/beets,LordSputnik/beets,shamangeorge/beets,drm00/beets,mosesfistos1/beetbox,Andypsamp/CODfinalJUNIT,imsparsh/beets,kelvinhammond/beets,jackwilsdon/beets,lengtche/beets,kelvinhammond/beets,asteven/beets,mried/beets,kelvinhammond/beets,YetAnotherNerd/beets,pdf/beets,artemutin/beets,sadatay/beets,ttsda/beets,lightwang1/beets,gabrielaraujof/beets,MyTunesFreeMusic/privacy-policy,dfc/beets,madmouser1/beets,jackwilsdon/beets,marcuskrahl/beets,diego-plan9/beets,jcoady9/beets,artemutin/beets,Andypsamp/CODjunit,ruippeixotog/beets,beetbox/beets,Wen777/beets,YetAnotherNerd/beets,lengtche/beets,sadatay/beets,Dishwishy/beets,Andypsamp/CODfinalJUNIT,asteven/beets,shanemikel/beets,imsparsh/beets,parapente/beets,marcuskrahl/beets,swt30/beets,Andypsamp/CODjunit,untitaker/beets,beetbox/beets,SusannaMaria/beets,jcoady9/beets,xsteadfastx/beets,ruippeixotog/beets,LordSputnik/beets,kareemallen/beets,ibmibmibm/beets,mried/beets,arabenjamin/beets,sampsyo/beets,randybias/beets,Wen777/beets,arabenjamin/beets,m-urban/beets,mosesfistos1/beetbox,Kraymer/beets,PierreRust/beets,gabrielaraujof/beets,pdf/beets,multikatt/beets,LordSputnik/beets,mosesfistos1/beetbox,pkess/beets,andremiller/beets,Wen777/beets,imsparsh/beets,Andypsamp/CODfinalJUNIT,Andypsamp/CODjunit,m-urban/beets,untitaker/beets,jmwatte/beets,kareemallen/beets,jcoady9/beets,swt30/beets,bj-yinyan/beets,Dishwishy/beets,krig/beets,arabenjamin/beets,Andypsamp/CODfinalJUNIT,madmouser1/beets,asteven/beets,jmwatte/beets,pkess/beets,m-urban/beets,drm00/beets,Freso/beets,dfc/beets,jcoady9/beets,Andypsamp/CODjunit,moodboom/beets,mathstuf/beets,Freso/beets,untitaker/beets,SusannaMaria/beets,gabrielaraujof/beets,kelvinhammond/beets,ruippeixotog/beets,dfc/beets,pkess/beets,MyTunesFreeMusic/privacy-policy,diego-plan9/beets,marcuskrahl/beets,sampsyo/beets,tima/beets,bj-yinyan/beets,madmouser1/beets,moodboom/beets,Freso/beets,madmouser1/beets,sadatay/beets,parapente/beets,jackwilsdon/beets,shanemikel/beets,tima/beets,sampsyo/beets,lightwang1/beets,YetAnotherNerd/beets,multikatt/beets,jbaiter/beets,mried/beets,artemutin/beets,dfc/beets,LordSputnik/beets