add eslint and clean up code

dev/config.js

@@ -36,7 +36,7 @@ module.exports = [
         "type": "toggle",
         "appKey": "cool_stuff",
         "label": "Enable Cool Stuff",
-        "value": false
+        "value": true
       },
       {
         "type": "color",

dev/custom-fn.js

@@ -1,7 +1,7 @@
 'use strict';
 
 module.exports = function() {
-  var Clay = this;
+  var Clay = window.Clay = this;
 
   Clay.getItemByAppKey('cool_stuff').on('change', function() {
     if (this.get()) {