Included greeting string in changeset_comment_notification email

app/models/notifier.rb

@@ -167,6 +167,7 @@ class Notifier < ActionMailer::Base
 
   def changeset_comment_notification(comment, recipient)
     with_recipient_locale recipient do
+      @to_user = recipient.display_name
       @changeset_url = changeset_url(comment.changeset, :host => SERVER_URL)
       @comment = comment.body
       @owner = recipient == comment.changeset.user

app/views/notifier/changeset_comment_notification.html.erb

@@ -1,3 +1,6 @@
+<p>
+  <%= t 'notifier.changeset_comment_notification.hi', :to_user => @to_user %>
+</p>
 <p>
   <% if @owner %>
     <%= raw t "notifier.changeset_comment_notification.commented.your_changeset", :commenter => link_to_user(@commenter), :time => @time %>

app/views/notifier/changeset_comment_notification.text.erb

@@ -1,4 +1,4 @@
-<%= t 'notifier.changeset_comment_notification.greeting' %>
+<%= t 'notifier.changeset_comment_notification.hi', :to_user => @to_user %>
 
 <% if @owner %>
   <%= t "notifier.changeset_comment_notification.commented.your_changeset", :commenter => @commenter, :time => @time %>