Add developers to send arbitrary data to the config page

dev/custom-fn.js

@@ -21,4 +21,6 @@ module.exports = function() {
     toggleBackground.call(coolStuffToggle);
     coolStuffToggle.on('change', toggleBackground);
   });
+
+  console.log('userData: ', Clay.meta.userData);
 };

dev/dev.js

@@ -5,6 +5,9 @@ window.clayConfig = require('./config.js');
 window.claySettings = {};
 window.customFn = require('./custom-fn.js');
 window.clayComponents = require('../src/scripts/components');
+window.clayMeta = require('../test/fixture').meta({
+  userData: {foo: 'bar'}
+});
 
 var platform = window.navigator.userAgent.match(/Android/) ? 'android' : 'ios';
 document.documentElement.classList.add('platform-' + platform);