Add summaries for notes and merge requests to dashboard feed.

This fixes #305.

app/helpers/events_helper.rb

@@ -83,6 +83,10 @@ module EventsHelper
       render "events/event_issue", issue: event.issue
     elsif event.push?
       render "events/event_push", event: event
+    elsif event.merge_request?
+      render "events/event_merge_request", merge_request: event.merge_request
+    elsif event.note?
+      render "events/event_note", note: event.note
     end
   end

app/models/event.rb

@@ -33,6 +33,7 @@ class Event < ActiveRecord::Base
   delegate :name, :email, to: :author, prefix: true, allow_nil: true
   delegate :title, to: :issue, prefix: true, allow_nil: true
   delegate :title, to: :merge_request, prefix: true, allow_nil: true
+  delegate :title, to: :note, prefix: true, allow_nil: true
   belongs_to :author, class_name: "User"
   belongs_to :project
@@ -147,6 +148,10 @@ class Event < ActiveRecord::Base
     target if target_type == "MergeRequest"
   end
+  def note
+    target if target_type == "Note"
+  end
+
   def action_name
     if closed?
       "closed"

app/views/events/_event_merge_request.atom.haml

+%div{xmlns: "http://www.w3.org/1999/xhtml"}
+  %p= simple_format merge_request.description

app/views/events/_event_note.atom.haml

+%div{:xmlns => "http://www.w3.org/1999/xhtml"}
+  %p= simple_format note.note