fix issue #2

Author: steffans

src/index.js

@@ -1,14 +1,14 @@
-var _ = require('./util');
-var Url = require('./url');
-var Http = require('./http');
-var Resource = require('./resource');
-
 /**
  * Install plugin.
  */
 
 function install (Vue) {
 
+    var _ = require('./util');
+    var Url = require('./url');
+    var Http = require('./http');
+    var Resource = require('./resource');
+
     Vue.url = Url;
     Vue.http = Http;
     Vue.resource = Resource;