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/AttrDef.php

@@ -5,7 +5,7 @@ class HTMLPurifier_AttrDef
 {
     function HTMLPurifier_AttrDef() {}
     
-    function validate() {
+    function validate($string, $config = null) {
         trigger_error('Cannot call abstract function', E_USER_ERROR);
     }