title: aligning left or right on bootstrap nabber
body: <p>where in this code it says the brand will go left and the button right?</p>
  
  <p>a collapse navigation bar on mobile device.</p>
  
  <pre><code>&lt;div class="navbar-header"&gt;
    &lt;button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false"&gt;
      &lt;span class="sr-only"&gt;Toggle navigation&lt;/span&gt;
      &lt;span class="icon-bar"&gt;&lt;/span&gt;
      &lt;span class="icon-bar"&gt;&lt;/span&gt;
      &lt;span class="icon-bar"&gt;&lt;/span&gt;
    &lt;/button&gt;
    &lt;a class="navbar-brand" href="#"&gt;Brand&lt;/a&gt;
  &lt;/div&gt;
  </code></pre>