Add default stretch for ImageNormalize
Add default stretch for ImageNormalize

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