title: middleman 3.0.11 do not know template=html5-haml
body: <p>I'm following getting started on main website. And I copy-paste:</p>
  
  <pre><code>middleman init my_new_mobile_project --template=html5-haml
  </code></pre>
  
  <p>Unknown project template 'html5-haml'</p>
  
  <pre><code>middleman init my_new_mobile_project --template=html5
  </code></pre>
  
  <p>Works...</p>
  
  <p>Middleman 3.0.11.</p>