lightweight logicless templating with HTML escaping

1. Include jig.js

2. Put templates in <script> elements

   <script data-template="comment" type="text/template">
   	<li><a href="/user/{{author.username}}">{{author.full_name}}</a>:
   	{{{comment_html}}}</li>
   </script>

3. Render templates with template.template_name(data)

   var html = template.comment({
   	author: {
   		username: 'joey12',
   		full_name: 'Joe Sparks'
   	},
   	comment_html: 'Does <em>this</em> support <strong>markdown</strong>?'
   });

4. Append to DOM with Element.insertAdjacentHTML

   var commentsEl = document.getElementById('comments');
   commentsEl.insertAdjacentHTML('beforeend', html);