demo/index.html
<!DOCTYPE html>
<html>
<head>
<title>{{project_name}} Demo</title>
<script src="../../web-component-tester/browser.js"></script>
<link rel="import" href="../{{element_name}}.html">
</head>
<body>
This is what your element looks like:
<hr>
<{{element_name}}></{{element_name}}>
<hr>
Ain't it purdy?
</body>
</html>