initial trial implementation of storing a single differential on a BaseCoordinateFrame
initial trial implementation of storing a single differential on a BaseCoordinateFrame

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