title: bootstrap default navbar dropdown not working
body: <p>I created an <a href="https://gist.github.com/pcantalupo/330b64ffad9ae68f6e9c42818134264a" rel="nofollow noreferrer">html file</a> with the bootstrap default navbar example <a href="http://getbootstrap.com/components/#navbar-default" rel="nofollow noreferrer">from this page</a>. When I open the file in Chrome, Firefox, or IE, the dropdown menus do not work. However, the <a href="http://getbootstrap.com/components/#navbar-default" rel="nofollow noreferrer">bootstrap webpage showing the example</a> does work in Chrome. What am I doing wrong? </p>