Merge branch 'platzi_homepage' into 'master'

Platzi homepage

Added Platzi to the homepage

![Screen Shot 2015-03-10 at 10.21.52 AM](https://gitlab.com/uploads/gitlab-com/www-gitlab-com/f7cdde21dd/Screen_Shot_2015-03-10_at_10.21.52_AM.png)

See merge request !595

source/index.html

@@ -314,6 +314,9 @@ extra_css:
     <br />
     <div class="col-sm-12 col-md-12 text-center">
        <iframe class="videoembed" src="https://www.youtube.com/embed/raXvuwet78M" frameborder="0" allowfullscreen=""></iframe>
+      <div class="see-more-tuts">
+        <p>See our <a href="https://courses.platzi.com/classes/git-gitlab/">Git & GitLab course at Platzi</a></p>
+      </div>
     </div>
   </div>
 </div>

source/stylesheets/landing.css

@@ -723,9 +723,20 @@
       -o-filter: none;
       filter: none;
       filter: none; /* Firefox 4+ */
-      filter: none; /* IE 6-9 */
+      filter: none; /* IE 6-9 */;
     }
+.see-more-tuts {
+  font-size: 30px;
+  margin-top: 16px;
+  font-family: "Korolev-Light";
+}
+
+  .see-more-tuts a {
+    color: whitesmoke;
+    text-decoration: underline;
+  }
+
 /* animations! */
 .come-in {
   -webkit-transform: translateY(150px);