Merge pull request #146 from maknoll/master

link "GITLAB" logo to root_url instead of '/'

app/views/layouts/_head_panel.html.erb

 <!-- Page Header -->
 <header>
   <h1 class="logo">
-    <a href="/">GITLAB</a>
+    <%= link_to "GITLAB", root_url %>
   </h1>
   <div class="account-box">
     <%= link_to profile_path, :class => "pic" do %>