Move last push info at top of project page.

app/views/projects/_activity.html.haml

-= render 'projects/last_push'
 .gray-content-block.activity-filter-block
   - if current_user
     .pull-right

app/views/projects/activity.html.haml

 - page_title "Activity"
 - header_title project_title(@project, "Activity", activity_project_path(@project))
 
+= render 'projects/last_push'
+
 = render 'projects/activity'

app/views/projects/show.html.haml

@@ -7,8 +7,7 @@
     = render 'shared/no_ssh'
     = render 'shared/no_password'
 
-- if prefer_readme?
-  = render 'projects/last_push'
+= render 'projects/last_push'
 
 = render "home_panel"