CC-3367: Display in Now Playing whether Live DJ stream and Live Master stream

are connected and give user the ability to block those streams

- added stream source switch interface
- backend code

airtime_mvc/application/views/helpers/SourceConnectionStatus.php

@@ -0,0 +1,8 @@
+<?php
+
+class Airtime_View_Helper_SourceConnectionStatus extends Zend_View_Helper_Abstract{
+    public function SourceConnectionStatus(){
+        $status = array("live_dj"=>Application_Model_Preference::GetSourceStatus("live_dj"), "master_dj"=>Application_Model_Preference::GetSourceStatus("master_dj"));
+        return $status;
+    }
+}