Warn when parallel feature is enabled on Windows
Warn when parallel feature is enabled on Windows

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