fix(configParser): load new functions from configs

Closes #1043

Author: thetoothpick

lib/configParser.js

@@ -56,7 +56,9 @@ var ConfigParser = function() {
  */
 var merge_ = function(into, from) {
   for (var key in from) {
-    if (into[key] instanceof Object && !(into[key] instanceof Array)) {
+    if (into[key] instanceof Object &&
+        !(into[key] instanceof Array) &&
+        !(into[key] instanceof Function)) {
       merge_(into[key], from[key]);
     } else {
       into[key] = from[key];