Merge pull request GitLabPHP#110 from shulard/features/note-model-id-access

Allow to access `Note` id through `__get`

Author: m4tthumphrey

lib/Gitlab/Model/Note.php

@@ -19,6 +19,7 @@ class Note extends AbstractModel
      * @var array
      */
     protected static $properties = array(
+        'id',
         'author',
         'body',
         'created_at',