Correct forum/gitter button (#227)

Author: marcospereira

app/views/index.scala.html

@@ -31,9 +31,9 @@ <h2>Read the Docs</h2>
 
             <div id="tutorials">
                 <h2>Get Involved</h2>
-                <a href='//discuss.playframework.com'>Join the Discuss<br/>Play Forum</a>
+                <a href='//discuss.playframework.com' class="button">Join the Discuss<br/>Play Forum</a>
                 <p>
-                  Join <a href="//gitter.im/playframework/playframework" class="button">Gitter's Play channel</a> and <a href="https://stackoverflow.com/questions/tagged/playframework">Stack Overflow</a>
+                  Join <a href="//gitter.im/playframework/playframework">Gitter's Play channel</a> and <a href="https://stackoverflow.com/questions/tagged/playframework">Stack Overflow</a>
                 </p>
             </div>
         </div>
@@ -236,4 +236,4 @@ <h2>They already use Play Framework</h2>
         </article>
     </section>
 <script type="text/javascript" charset="utf-8" src="@routes.Assets.versioned("javascripts/fse.js")"></script>
-}
+}