Implement lang and xml:lang. Fixed a bunch of bugs too.

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@162 48356398-32a2-884e-a903-53898d9a118a

library/HTMLPurifier/AttrTransform.php

@@ -0,0 +1,14 @@
+<?php
+
+// AttrTransform = Attribute Transformation, when handling one attribute
+//                 isn't enough
+class HTMLPurifier_AttrTransform
+{
+    function HTMLPurifier_AttrTransform() {}
+    
+    function transform($token, $config = null) {
+        trigger_error('Cannot call abstract function', E_USER_ERROR);
+    }
+}
+
+?>