ui output for average (#252)

src/modules/Average/Module.js

@@ -49,6 +49,8 @@ module.exports = function Average(options, UI){
             // report back and store average in metadata:
             options.step.metadata.averages = sum;
             console.log("average: ", sum);
+            // TODO: refactor into a new "display()" method as per https://github.com/publiclab/image-sequencer/issues/242
+            if (options.step.inBrowser && options.step.ui) $(options.step.ui).find('.details').append("<p><b>Averages</b> (r, g, b, a): " + sum.join(', ') + "</p>");
             return pixels;
         }