Added Facebook like button and fixed a typo

index.html

@@ -27,9 +27,10 @@ <h1>HTML5 Web Notifications</h1>
     <p>Read the <a href="http://tumblr.dangercove.com/post/17213260067/html5-web-notifications" target="_blank">accompanying blog post</a> for more insights and references.</p>
   </header>
   <div id="content" role="main" class="container">
+    <div class="fb-like" data-href="http://dangercove.github.com/html5-notifications/" data-send="true" data-width="450" data-show-faces="true"></div>
     <div id="not_supported">
       <h2>Not supported</h2>
-      <p>Sorry, too keep it simple and prevent exceptions, this demonstration uses the vendor-specific <code>window.webkitNotifications</code>, which of all the Webkit-browsers is currently only supported by Google Chrome.</p>
+      <p>Sorry, to keep it simple and prevent exceptions, this demonstration uses the vendor-specific <code>window.webkitNotifications</code>, which of all the Webkit-browsers is currently only supported by Google Chrome.</p>
       <p>For information on the use of <code>window.mozNotifications</code>, check <a href="https://wiki.mozilla.org/Services/Notifications/Push/API" target="_blank">Mozilla's wiki</a>. It's very similar to Webkit's implementation, but lacks HTML notifications.</p>
     </div>
     <div id="blocked">
@@ -95,5 +96,14 @@ <h3>HTML</h3>
     g.src=('https:'==location.protocol?'//ssl':'//www')+'.google-analytics.com/ga.js';
     s.parentNode.insertBefore(g,s)}(document,'script'));
   </script>
+
+  <div id="fb-root"></div>
+  <script>(function(d, s, id) {
+    var js, fjs = d.getElementsByTagName(s)[0];
+    if (d.getElementById(id)) return;
+    js = d.createElement(s); js.id = id;
+    js.src = "//connect.facebook.net/en_US/all.js#xfbml=1&appId=220083111392605";
+    fjs.parentNode.insertBefore(js, fjs);
+  }(document, 'script', 'facebook-jssdk'));</script>
 </body>
 </html>