allow passing a differential class or dict of classes to basecoordinateframe init
allow passing a differential class or dict of classes to basecoordinateframe init

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