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/unittest/lists9.md

@@ -0,0 +1,85 @@
+Write a comment here
+*** Parameters: ***
+{} # params 
+*** Markdown input: ***
+- Due
+  1. tre
+  1. tre
+  1. tre
+- Due
+*** Output of inspect ***
+md_el(:document,[
+	md_el(:ul,[
+		md_el(:li,[
+			md_par(["Due"]),
+			md_el(:ol,[
+				md_el(:li_span,["tre"],{:want_my_paragraph=>false},[]),
+				md_el(:li_span,["tre"],{:want_my_paragraph=>false},[]),
+				md_el(:li_span,["tre"],{:want_my_paragraph=>false},[])
+			],{},[])
+		],{:want_my_paragraph=>true},[]),
+		md_el(:li,[md_par(["Due"])],{:want_my_paragraph=>false},[])
+	],{},[])
+],{},[])
+*** Output of to_html ***
+<ul>
+<li>
+<p>Due</p>
+
+<ol>
+<li>tre</li>
+
+<li>tre</li>
+
+<li>tre</li>
+</ol>
+</li>
+
+<li>
+<p>Due</p>
+</li>
+</ul>
+*** Output of to_latex ***
+\begin{itemize}%
+\item Due
+
+\begin{enumerate}%
+\item tre
+\item tre
+\item tre
+
+\end{enumerate}
+
+\item Due
+
+
+
+\end{itemize}
+*** Output of to_md ***
+-ue* tre
+* tre
+* tre
+-ue
+*** Output of to_s ***
+DuetretretreDue
+*** EOF ***
+
+
+
+	OK!
+
+
+
+*** Output of Markdown.pl ***
+<ul>
+<li>Due
+<ol>
+<li>tre</li>
+<li>tre</li>
+<li>tre</li>
+</ol></li>
+<li>Due</li>
+</ul>
+
+*** Output of Markdown.pl (parsed) ***
+Error: #<NoMethodError: private method `write_children' called for <div> ... </>:REXML::Element>