Added documentation for new functionality
Added documentation for new functionality

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