added rss/atom feeds at project levels for:

* news
* new issues reported
* details of issue changes

issue cutom queries can be used as feeds

git-svn-id: http://redmine.rubyforge.org/svn/trunk@339 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/journal.rb

@@ -17,6 +17,10 @@
 
 class Journal < ActiveRecord::Base
   belongs_to :journalized, :polymorphic => true
+  # added as a quick fix to allow eager loading of the polymorphic association
+  # since always associated to an issue, for now
+  belongs_to :issue, :foreign_key => :journalized_id
+  
   belongs_to :user
   has_many :details, :class_name => "JournalDetail", :dependent => :delete_all
 end