fix for faulty setuptools0.6c11
fix for faulty setuptools0.6c11

based on @astrofrog's suggestion in #396

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