Allow time format and scale strings to be case-insensitive
Allow time format and scale strings to be case-insensitive

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