quickstart info.

js/camera.html

@@ -1,4 +1,11 @@
<p>(Intentionally left blank, take a look at the console.)</p>
<p>Quickstart: After you allow camera access there will be an image
in the <code>img</code> variable. <code>getImage();</code> takes a new
images, stores it there and returns it.</p>
<p><code>img</code> is of the type <a href="https://developer.mozilla.org/en/docs/Web/API/ImageData">ImageData</a>
and <code>img.data</code> contains the (flattened, rgba) pixel values.</p>
<p>Now go and do something with it! Have fun!</p>
<script>
  navigator.getUserMedia = navigator.getUserMedia || navigator.mozGetUserMedia || navigator.webkitGetUserMedia;