Added API key authentication

UI/ServerStatus.js

@@ -1,10 +1,12 @@
-window.NzbDrone = {};
 window.NzbDrone.ApiRoot = '/api';
 
 var statusText = $.ajax({
     type : 'GET',
     url  : window.NzbDrone.ApiRoot + '/system/status',
-    async: false
+    async: false,
+    headers: {
+        ApiKey: window.NzbDrone.ApiKey
+    }
 }).responseText;
 
 window.NzbDrone.ServerStatus = JSON.parse(statusText);