Updated to allow easily checking for empty lists

Example:

```html
{{ if available_colors }}
	<h5>Available Colors</h5>
	<ul>
	{{ available_colors }}
		<li>{{ value }}</li>
	{{ /available_colors }}
	</ul>				
{{ endif }}
```
Merge pull request #2 from ryun/patch-1

Updated to allow easily checking for empty lists