Added test against Edelbaum circle-to-circle equations
Added test against Edelbaum circle-to-circle equations

anhiga/poliastro,newlawrence/poliastro,newlawrence/poliastro,anhiga/poliastro,anhiga/poliastro,newlawrence/poliastro,Juanlu001/poliastro,Juanlu001/poliastro,poliastro/poliastro,Juanlu001/poliastro