gsprenger/sustainabilitychecker

<nav class="navbar navbar-default" role="navigation">
  <div class="container-fluid text-center">  
    <!-- Brand and toggle get grouped for better mobile display -->
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#site-header">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="/home"><img src="<%= asset_path 'logo-small.png' %>"> The Sustainability Sudoku</a>
    </div>
    <!-- Collect the nav links, forms, and other content for toggling -->
    <div class="collapse navbar-collapse" id="site-header">
      <ul class="nav navbar-nav pull-right">
        <li class='<%= action_name == 'index' ? " active" : "" %>'>
          <a href="/" data-no-turbolink='true'>Home</a> <!-- Disable Turbolinks for Home so that the Twitter timeline always gets loaded -->
        </li>
        <li class='<%= action_name == 'app' ? " active" : "" %>'>
          <a href="/start">Play Now</a>
        </li>
        <li class='<%= action_name == 'more' ? " active" : "" %>'>
          <a href="/more">Learn More</a>
        </li>
        <li class='<%= action_name == 'contact' ? " active" : "" %>'>
          <a href="/contact">Contact Us</a>
        </li>
      </ul>
    </div><!-- /.navbar-collapse -->
  </div><!-- /.container-fluid -->
</nav>