Add docs to append_column and insert_column
Add docs to append_column and insert_column

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