Rough In New Sanitizer

Start work (which may not pan out) on a new sanitizer. Right now, it passes
all but 1 of the HTML5lib Sanitizer's unit tests. But it doesn't do much
of anything to ensure well-formedness. This is not an issue for Maruku-processed
content, but it is a concern for <nowiki> blocks.

(One solution would be to use the HTML5lib parser on <nowiki> blocks.)

In any case, this baby is 3 times as fast as the HTML5lib sanitizer.

lib/wiki_content.rb

@@ -7,8 +7,6 @@ require_dependency 'chunks/literal'
 require 'chunks/nowiki'
 require 'sanitize'
 
-include Sanitize
-
 # Wiki content is just a string that can process itself with a chain of
 # actions. The actions can modify wiki content so that certain parts of
 # it are protected from being rendered by later actions.
@@ -116,6 +114,7 @@ end
 class WikiContent < String
 
   include ChunkManager
+  include Sanitize
 
   DEFAULT_OPTS = {
     :active_chunks       => ACTIVE_CHUNKS,