Merge pull request #2 from paulvancraen/fix_reference

Add reference to Message

Author: Roemerb

src/Spryng/SpryngRestApi/Resources/MessageClient.php

@@ -30,6 +30,7 @@ public function send(Message $message)
             ->addParameter('route', $message->getRoute())
             ->addParameter('originator', $message->getOriginator())
             ->addParameter('recipients', $message->getRecipients())
+            ->addParameter('reference', $message->getReference())
             ->send();
     }
 
@@ -77,4 +78,4 @@ public function showAll($page = 1, $limit = 15, $filters = array())
 
         return $req->send();
     }
-}
+}