Minor Kernel1D and Kernel2D constructor changes
Minor Kernel1D and Kernel2D constructor changes

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