Add AppVeyor configuration
Add AppVeyor configuration

For Windows CI builds.

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