MDL-14898 upgraded html purifier to 3.1.0 in HEAD

lib/htmlpurifier/HTMLPurifier/ConfigSchema/Interchange/Namespace.php

@@ -0,0 +1,19 @@
+<?php
+
+/**
+ * Interchange component class describing namespaces.
+ */
+class HTMLPurifier_ConfigSchema_Interchange_Namespace
+{
+    
+    /**
+     * Name of namespace defined.
+     */
+    public $namespace;
+    
+    /**
+     * HTML description.
+     */
+    public $description;
+    
+}