Added masked array and normalize function tests
Added masked array and normalize function tests

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