Merge branch 'timestamp-wikis' into 'master'

Added a timestamp to the wikis page just below the title

Now it looks like this:

![image](https://gitlab.com/gitlab-org/gitlab-ce/uploads/813f85496db915cf14ee223c8b15478f/image.png)



See merge request !1055

app/views/projects/wikis/show.html.haml

@@ -3,6 +3,10 @@
 %h3.page-title
   = @page.title
   = render 'main_links'
+
+.wiki-last-edit-by
+  Last edited by #{@page.commit.author.name} #{time_ago_with_tooltip(@page.commit.authored_date)}
+
 - if @page.historical?
   .warning_message
     This is an old version of this page.
@@ -16,6 +20,6 @@
       = render_wiki_content(@page)
 
 %hr
-
 .wiki-last-edit-by
   Last edited by #{@page.commit.author.name} #{time_ago_with_tooltip(@page.commit.authored_date)}
+