[1.7.0] Various updates

- Implement addModule(), requires new userModules property
- Remove unnecessary $config passing for getElement(s)
- Revamp HTMLModuleManagerTest
- Fix buggy unit test for unrecognized parent
- Remove anonymous generator member variable from ChildDef_Required

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1063 48356398-32a2-884e-a903-53898d9a118a

library/HTMLPurifier/HTMLModule.php

@@ -136,7 +136,7 @@ class HTMLPurifier_HTMLModule
      *         can set advanced parameters
      * @protected
      */
-    function &addElement($element, $safe, $type, $contents, $attr_includes, $attr = array()) {
+    function &addElement($element, $safe, $type, $contents, $attr_includes = array(), $attr = array()) {
         $this->elements[] = $element;
         // parse content_model
         list($content_model_type, $content_model) = $this->parseContents($contents);