Correctly compute feed folders
Correctly compute feed folders

fixes #303

elancom/goread,beni55/goread,doublehou/goread,mikecb/goread,Feitianyuan/goread,P7h/goread,beni55/goread,mjibson/goread,youprofit/goread,elancom/goread,P7h/goread,mgaitan/goread,wangjun/goread,lnmx/goread,mgaitan/goread,doublehou/goread,P7h/goread,mikecb/goread,wangjun/goread,lnmx/goread,elancom/goread,youprofit/goread,beni55/goread,wangjun/goread,youprofit/goread,Feitianyuan/goread,mjibson/goread,mgaitan/goread,mjibson/goread,doublehou/goread,mikecb/goread,lnmx/goread,Feitianyuan/goread