Updated API responses for new album artist support
Updated API responses for new album artist support

Closes #52

spl0k/supysonic,hhm0/supysonic,nwokeo/supysonic,hhm0/supysonic,spl0k/supysonic,nwokeo/supysonic,nwokeo/supysonic,nwokeo/supysonic,spl0k/supysonic,nwokeo/supysonic,hhm0/supysonic