add bash completions for hub command arguments
add bash completions for hub command arguments

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