Upgrade to six 1.4
Upgrade to six 1.4

saimn/astropy,MSeifert04/astropy,larrybradley/astropy,larrybradley/astropy,astropy/astropy,DougBurke/astropy,stargaser/astropy,dhomeier/astropy,StuartLittlefair/astropy,astropy/astropy,lpsinger/astropy,DougBurke/astropy,lpsinger/astropy,lpsinger/astropy,MSeifert04/astropy,kelle/astropy,dhomeier/astropy,joergdietrich/astropy,tbabej/astropy,pllim/astropy,bsipocz/astropy,saimn/astropy,aleksandr-bakanov/astropy,MSeifert04/astropy,bsipocz/astropy,StuartLittlefair/astropy,joergdietrich/astropy,saimn/astropy,StuartLittlefair/astropy,stargaser/astropy,astropy/astropy,funbaker/astropy,mhvk/astropy,joergdietrich/astropy,joergdietrich/astropy,aleksandr-bakanov/astropy,lpsinger/astropy,StuartLittlefair/astropy,AustereCuriosity/astropy,kelle/astropy,tbabej/astropy,astropy/astropy,DougBurke/astropy,tbabej/astropy,tbabej/astropy,pllim/astropy,StuartLittlefair/astropy,aleksandr-bakanov/astropy,funbaker/astropy,joergdietrich/astropy,larrybradley/astropy,mhvk/astropy,AustereCuriosity/astropy,bsipocz/astropy,pllim/astropy,AustereCuriosity/astropy,mhvk/astropy,larrybradley/astropy,mhvk/astropy,saimn/astropy,AustereCuriosity/astropy,larrybradley/astropy,aleksandr-bakanov/astropy,dhomeier/astropy,dhomeier/astropy,astropy/astropy,kelle/astropy,stargaser/astropy,kelle/astropy,pllim/astropy,saimn/astropy,mhvk/astropy,lpsinger/astropy,dhomeier/astropy,MSeifert04/astropy,AustereCuriosity/astropy,tbabej/astropy,stargaser/astropy,pllim/astropy,funbaker/astropy,kelle/astropy,funbaker/astropy,bsipocz/astropy,DougBurke/astropy