Fixing config weirdness

lib/utils.js

@@ -212,7 +212,11 @@ function forEach(obj, fn) {
 function merge(/* obj1, obj2, obj3, ... */) {
   var result = {};
   function assignValue(val, key) {
-    result[key] = val;
+    if (typeof result[key] === 'object' && typeof val === 'object') {
+      result[key] = merge(result[key], val);
+    } else {
+      result[key] = val;
+    }
   }
 
   for (var i = 0, l = arguments.length; i < l; i++) {