added check in setup_helpers for AttributeError that's thrown in setup.py --help
added check in setup_helpers for AttributeError that's thrown in setup.py --help

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