Use jquery timeago plugin

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/assets/javascripts/main.js.coffee

@@ -81,6 +81,7 @@ $ ->
     $(@).parents('form').submit()
 
   $("abbr.timeago").timeago()
+  $('.js-timeago').timeago()
 
   # Flash
   if (flash = $(".flash-container")).length > 0

app/helpers/application_helper.rb

@@ -72,7 +72,7 @@ module ApplicationHelper
 
   def last_commit(project)
     if project.repo_exists?
-      time_ago_with_tooltip(project.repository.commit.committed_date) + " ago"
+      time_ago_with_tooltip(project.repository.commit.committed_date)
     else
       "Never"
     end
@@ -210,11 +210,11 @@ module ApplicationHelper
 
   def time_ago_with_tooltip(date, placement = 'top', html_class = 'time_ago')
     capture_haml do
-      haml_tag :time, time_ago_in_words(date),
-        class: html_class, datetime: date, title: date.stamp("Aug 21, 2011 9:23pm"),
+      haml_tag :time, date.to_s,
+        class: html_class, datetime: date.getutc.iso8601, title: date.stamp("Aug 21, 2011 9:23pm"),
         data: { toggle: 'tooltip', placement: placement }
 
-      haml_tag :script, "$('." + html_class + "').tooltip()"
+      haml_tag :script, "$('." + html_class + "').timeago().tooltip()"
     end.html_safe
   end
 end

app/views/events/_event.html.haml

 - if event.proper?
   .event-item{class: "#{event.body? ? "event-block" : "event-inline" }"}
     %span.cgray.pull-right
-      #{time_ago_with_tooltip(event.created_at)} ago
+      #{time_ago_with_tooltip(event.created_at)}
 
     = cache event do
       = image_tag avatar_icon(event.author_email, 24), class: "avatar s24", alt:''