[html] add handlebars

extensions/handlebars/test/colorize-fixtures/test.hbs

@@ -0,0 +1,24 @@
+<h1>Comments</h1>
+
+<div id="comments">
+  {{#each comments}}
+  <h2><a href="/posts/{{../permalink}}#{{id}}">{{title}}</a></h2>
+  <div>{{body}}</div>
+  {{/each}}
+  <p>{{./name}} or {{this/name}} or {{this.name}}</p>
+</div>
+<div class="entry">
+  {{!-- only output author name if an author exists --}}
+  {{#if author}}
+    <h1>{{firstName}} {{lastName}}</h1>
+  {{/if}}
+</div>
+<div class="post">
+  {{> userMessage tagName="h1" }}
+
+  <h1>Comments</h1>
+
+  {{#each comments}}
+    {{> userMessage tagName="h2" }}
+  {{/each}}
+</div>