added change log entry.
added change log entry.

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