more notification stuff

app/views/notifications/index.html.haml

 %ul
   - @notifications.each do |note|
+    %h2= Date.parse(note.created_at.to_s).in_words
     %li
-      = link_to "#{note.person.name.titleize}", person_path(note.person)
-      = object_link(note)
+      %h3
+        = link_to "#{note.person.name.titleize}", person_path(note.person)
+        = object_link(note)
+        %span.description= time_ago_in_words(note.created_at)