Router updates + unit tests + React

- added -f flag to run unit test command in order to fail fast
- pass only id to "$endpoint->get($id)" in React forms instead of array
- updated routers according to the ->get($id) change
- refactored a bit the way form creation works
- added unit tests for Segments router

lib/Router/Subscribers.php

@@ -15,9 +15,7 @@ class Subscribers {
   function __construct() {
   }
 
-  function get($data = array()) {
-    $id = (isset($data['id']) ? (int) $data['id'] : 0);
-
+  function get($id = false) {
     $subscriber = Subscriber::findOne($id);
     if($subscriber !== false && $subscriber->id() > 0) {
       $segments = $subscriber->segments()->findArray();