moved imports for concolve.py inside function
moved imports for concolve.py inside function

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