Reorganize astropy.cfg based on general categories in docs.
Reorganize astropy.cfg based on general categories in docs.

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