inline: Add support for code blocks.
inline: Add support for code blocks.

This should be backwards compatible. In case the the path field
isn't a statement, beets will assume it's a block of code that
stores the value in a special '_' variable.

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