Added depreciated interfaces for private versions.
Added depreciated interfaces for private versions.

lpsinger/astropy,mhvk/astropy,mhvk/astropy,pllim/astropy,StuartLittlefair/astropy,saimn/astropy,mhvk/astropy,lpsinger/astropy,pllim/astropy,saimn/astropy,astropy/astropy,pllim/astropy,lpsinger/astropy,StuartLittlefair/astropy,larrybradley/astropy,astropy/astropy,mhvk/astropy,StuartLittlefair/astropy,larrybradley/astropy,lpsinger/astropy,lpsinger/astropy,StuartLittlefair/astropy,larrybradley/astropy,larrybradley/astropy,astropy/astropy,larrybradley/astropy,saimn/astropy,astropy/astropy,saimn/astropy,pllim/astropy,saimn/astropy,StuartLittlefair/astropy,mhvk/astropy,astropy/astropy,pllim/astropy