Changelog:  move changes from 4.1 to 4.0.1
Changelog:  move changes from 4.1 to 4.0.1

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