Outfit a bunch of other classes so they can accept a configuration object. Put in basic scaffolding for extractBody() functionality.

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@257 48356398-32a2-884e-a903-53898d9a118a

library/HTMLPurifier.php

@@ -59,8 +59,10 @@ class HTMLPurifier
         $generator = new HTMLPurifier_Generator();
         return $generator->generateFromTokens(
             $strategy->execute(
-                $lexer->tokenizeHTML($html), $config
-            )
+                $lexer->tokenizeHTML($html, $config),
+                $config
+            ),
+            $config
         );
     }