Backport changelog from 0.4.x
Backport changelog from 0.4.x

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