added some things in the documentation
added some things in the documentation

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