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

app/models/mail_handler.rb

@@ -110,13 +110,11 @@ class MailHandler < ActionMailer::Base
       end
       h
     end
+    # add To and Cc as watchers before saving so the watchers can reply to Redmine
+    add_watchers(issue)
     issue.save!
     add_attachments(issue)
     logger.info "MailHandler: issue ##{issue.id} created by #{user}" if logger && logger.info
-    # add To and Cc as watchers
-    add_watchers(issue)
-    # send notification after adding watchers so that they can reply to Redmine
-    Mailer.deliver_issue_add(issue) if Setting.notified_events.include?('issue_added')
     issue
   end
   
@@ -148,7 +146,6 @@ class MailHandler < ActionMailer::Base
     end
     issue.save!
     logger.info "MailHandler: issue ##{issue.id} updated by #{user}" if logger && logger.info
-    Mailer.deliver_issue_edit(journal) if Setting.notified_events.include?('issue_updated')
     journal
   end