Add entry about removing Table.create_mask to API changes
Add entry about removing Table.create_mask to API changes

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