Update to latest HTML5lib, Add Maruku testdir

Sync with the latest html5lib.
Having the Maruku unit tests on-hand may be useful for debugging; so let's include them.

vendor/plugins/maruku/tests/MarkdownTest_1.0/Tests/Inline HTML (Simple).text

@@ -0,0 +1,69 @@
+Here's a simple block:
+
+<div>
+	foo
+</div>
+
+This should be a code block, though:
+
+	<div>
+		foo
+	</div>
+
+As should this:
+
+	<div>foo</div>
+
+Now, nested:
+
+<div>
+	<div>
+		<div>
+			foo
+		</div>
+	</div>
+</div>
+
+This should just be an HTML comment:
+
+<!-- Comment -->
+
+Multiline:
+
+<!--
+Blah
+Blah
+-->
+
+Code block:
+
+	<!-- Comment -->
+
+Just plain comment, with trailing spaces on the line:
+
+<!-- foo -->   
+
+Code:
+
+	<hr />
+	
+Hr's:
+
+<hr>
+
+<hr/>
+
+<hr />
+
+<hr>   
+
+<hr/>  
+
+<hr /> 
+
+<hr class="foo" id="bar" />
+
+<hr class="foo" id="bar"/>
+
+<hr class="foo" id="bar" >
+