don't choke on empty config file
don't choke on empty config file

Fixes #184

elancom/hub,pcorpet/hub,ryo33/hub,pwaller/hub,AndBicScadMedia/hub,pcorpet/hub,codydaig/hub,ASidlinskiy/hub,aereal/hub,jingweno/hub,adjohnson916/hub,isundaylee/hub,rlugojr/hub,ypresto/hub,cpick/hub,hopil/hub,naru0504/hub,haikyuu/hub,yasuoza/hub,jpkrohling/hub,adjohnson916/hub,sbp/hub,dongjoon-hyun/hub,aspiers/hub,hb9kns/hub,whilp/hub,RichardLitt/hub,hb9kns/hub,pcorpet/hub,tomasv/hub,hopil/hub,whilp/hub,tomasv/hub,mattn/hub,ASidlinskiy/hub,xantage/hub,SanCoder-Q/hub,dev4mobile/hub,nmfzone/hub,yasuoza/hub,nlutsenko/hub,terry2000/hub,github/hub,xantage/hub,sbp/hub,dongjoon-hyun/hub,jingweno/hub,ryo33/hub,elancom/hub,pankona/hub,SanCoder-Q/hub,ZenPayroll/hub,RichardLitt/hub,ZenPayroll/hub,isundaylee/hub,ypresto/hub,jpkrohling/hub,haikyuu/hub,aspiers/hub,boris-rea/hub,haikyuu/hub,pwaller/hub,isundaylee/hub,AndBicScadMedia/hub,github/hub,nlutsenko/hub,terry2000/hub,aereal/hub,RichardLitt/hub,codydaig/hub,elancom/hub,mattn/hub,hb9kns/hub,sferik/hub,rlugojr/hub,jpkrohling/hub,terry2000/hub,dev4mobile/hub,sbp/hub,sferik/hub,dongjoon-hyun/hub,sideci-sample/sideci-sample-hub,rlugojr/hub,github/hub,sideci-sample/sideci-sample-hub,boris-rea/hub,pankona/hub,dev4mobile/hub,naru0504/hub,naru0504/hub,AndBicScadMedia/hub,jingweno/hub,aspiers/hub,tomasv/hub,nmfzone/hub,SanCoder-Q/hub,nlutsenko/hub,Gusto/hub,hopil/hub,boris-rea/hub,github/hub,Gusto/hub,ryo33/hub,ASidlinskiy/hub,nmfzone/hub,whilp/hub,pwaller/hub,codydaig/hub,aereal/hub,adjohnson916/hub,cpick/hub,pankona/hub,xantage/hub,cpick/hub