Change mod() to factory() as the mod does not exist #34

Gruntfile.js

@@ -44,7 +44,7 @@ module.exports = function(grunt) {
                           "if (typeof define === 'function' && define.amd)"+
                               "define([], factory);"+
                           "else if(typeof exports === 'object' && typeof module === 'object')"+
-                              "module.exports = mod();"+
+                              "module.exports = factory();"+
                           "else "+
                               "root.<%= pkg.name %> = root.GrapesJS = factory();"+
                       "}(this, function () {",