added a brief note about when 'convolve' is preferable
added a brief note about when 'convolve' is preferable

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