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.

test/unit/chunks/nowiki_test.rb

@@ -12,4 +12,16 @@ class NoWikiTest < Test::Unit::TestCase
 	)
   end
 
+  def test_markdown_nowiki
+	match(NoWiki, 'This sentence contains <nowiki>*raw text*</nowiki>. Do not touch!',
+		:plain_text => '*raw text*'
+	)
+  end
+
+  def test_no_sanitize_nowiki
+	match(NoWiki, 'This sentence contains <nowiki>[[test]]&<a href="a&b">shebang</a> <script>alert("xss!");</script> *foo*</nowiki>. Do not touch!',
+		:plain_text => '[[test]]&<a href="a&b">shebang</a> <script>alert("xss!");</script> *foo*'
+	)
+  end
+
 end