Added StandardDeviationError to __all__
Added StandardDeviationError to __all__

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