Added observers to watch model objects for mail delivery instead of calling Mailer.

* Added an IssueObserver to watch when Issues are created
* Added a JournalObserver to watch when Journals are created (Issue updates)
* Added a NewsObserver for News items.
* Added a DocumentObserver for Document notifications.
* Setup IssuesController#new to use the IssueObserver.
* Setup IssuesController#edit to use the IssueObserver.
* Setup IssuesController#bulk_edit to use the JournalObserver.
* Removed the Mailer call in Changeset#scan_commit_for_issue_ids, the
  JournalObserver will handle it.
* Removed Mailer calls in MailHandler in favor of the Observers.

  #2659

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@2637 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/unit/issue_test.rb

@@ -241,4 +241,12 @@ class IssueTest < Test::Unit::TestCase
     assert !Issue.new(:due_date => nil).overdue?
     assert !Issue.new(:due_date => 1.day.ago.to_date, :status => IssueStatus.find(:first, :conditions => {:is_closed => true})).overdue?
   end
+  
+  def test_create_should_send_email_notification
+    ActionMailer::Base.deliveries.clear
+    issue = Issue.new(:project_id => 1, :tracker_id => 1, :author_id => 3, :status_id => 1, :priority => Enumeration.priorities.first, :subject => 'test_create', :estimated_hours => '1:30')
+
+    assert issue.save
+    assert_equal 1, ActionMailer::Base.deliveries.size
+  end
 end