add cache test for each image in static/images folder
add cache test for each image in static/images folder

esfiddle/esfiddle,collinmesser/esfiddle,joshghent/es6-fiddle-web,esfiddle/esfiddle,vcapretz/esfiddle,asiyani/esfiddle,collinmesser/esfiddle,esfiddle/esfiddle,asiyani/esfiddle,joshghent/es6-fiddle-web,vcapretz/esfiddle