Update astropy/models/__init__.py
Update astropy/models/__init__.py

saimn/astropy,bsipocz/astropy,AustereCuriosity/astropy,kelle/astropy,aleksandr-bakanov/astropy,dhomeier/astropy,lpsinger/astropy,dhomeier/astropy,StuartLittlefair/astropy,kelle/astropy,StuartLittlefair/astropy,pllim/astropy,joergdietrich/astropy,pllim/astropy,saimn/astropy,aleksandr-bakanov/astropy,astropy/astropy,dhomeier/astropy,mhvk/astropy,aleksandr-bakanov/astropy,joergdietrich/astropy,kelle/astropy,kelle/astropy,DougBurke/astropy,DougBurke/astropy,saimn/astropy,bsipocz/astropy,pllim/astropy,joergdietrich/astropy,pllim/astropy,lpsinger/astropy,AustereCuriosity/astropy,aleksandr-bakanov/astropy,MSeifert04/astropy,larrybradley/astropy,mhvk/astropy,dhomeier/astropy,kelle/astropy,mhvk/astropy,tbabej/astropy,DougBurke/astropy,saimn/astropy,funbaker/astropy,dhomeier/astropy,stargaser/astropy,tbabej/astropy,bsipocz/astropy,tbabej/astropy,astropy/astropy,joergdietrich/astropy,larrybradley/astropy,stargaser/astropy,saimn/astropy,funbaker/astropy,stargaser/astropy,pllim/astropy,bsipocz/astropy,MSeifert04/astropy,AustereCuriosity/astropy,astropy/astropy,DougBurke/astropy,joergdietrich/astropy,tbabej/astropy,stargaser/astropy,AustereCuriosity/astropy,astropy/astropy,lpsinger/astropy,larrybradley/astropy,larrybradley/astropy,MSeifert04/astropy,lpsinger/astropy,astropy/astropy,funbaker/astropy,mhvk/astropy,larrybradley/astropy,StuartLittlefair/astropy,StuartLittlefair/astropy,MSeifert04/astropy,StuartLittlefair/astropy,mhvk/astropy,AustereCuriosity/astropy,funbaker/astropy,tbabej/astropy,lpsinger/astropy