title: firebase is not defined at firebase.initializeApp(config);
body: <p>I cloned the angular-seed repo and am trying to create an app using Firebase on top of it. I have </p>
  
  <pre><code>&lt;script src="https://www.gstatic.com/firebasejs/3.6.5/firebase.js"&gt;&lt;/script&gt;
  </code></pre>
  
  <p>in my HTML document, and I also have the config object set up with my apiKey, authDomain, etc. But, I get an "Uncaught ReferenceError: firebase is not defined" in my console, at the line </p>
  
  <pre><code>firebase.initializeApp(config).
  </code></pre>
  
  <p>Why am I getting this error? What can I do to fix this error?</p>