Add tab at dashboard.

src/main/twirl/dashboard/tab.scala.html

@@ -0,0 +1,8 @@
+@(active: String = "")(implicit context: app.Context)
+@import context._
+<ul class="nav nav-tabs">
+  <li@if(active == ""){ class="active"}><a href="/">News Feed</a></li>
+  @if(loginAccount.isDefined){
+    <li@if(active == "issues"){ class="active"}><a href="/dashboard/issues/repos">Issues</a></li>
+  }
+</ul>

src/main/twirl/index.scala.html

@@ -5,9 +5,9 @@
 @import context._
 @import view.helpers._
 @main("GitBucket"){
+@dashboard.html.tab()
 <div class="row-fluid">
   <div class="span8">
-    <h3>News Feed</h3>
     @helper.html.activities(activities)
   </div>
   <div class="span4">