add ecliptic transformation example plot
add ecliptic transformation example plot

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