Merged r2116, r2117 and r2187 from trunk.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/0.8-stable@2217 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/message.rb

@@ -19,7 +19,7 @@ class Message < ActiveRecord::Base
   belongs_to :board
   belongs_to :author, :class_name => 'User', :foreign_key => 'author_id'
   acts_as_tree :counter_cache => :replies_count, :order => "#{Message.table_name}.created_on ASC"
-  has_many :attachments, :as => :container, :dependent => :destroy
+  acts_as_attachable
   belongs_to :last_reply, :class_name => 'Message', :foreign_key => 'last_reply_id'
   
   acts_as_searchable :columns => ['subject', 'content'],