Merged 0.6 branch into trunk.

Permissions management was rewritten. Some permissions can now be specifically defined for non member and anonymous users.
This migration:
* is irreversible (please, don't forget to *backup* your database before upgrading)
* resets role's permissions (go to "Admin -> Roles & Permissions" to set them after upgrading)

git-svn-id: http://redmine.rubyforge.org/svn/trunk@674 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/controllers/users_controller.rb

@@ -87,7 +87,7 @@ class UsersController < ApplicationController
       end
     end
     @auth_sources = AuthSource.find(:all)
-    @roles = Role.find(:all, :order => 'position')
+    @roles = Role.find_all_givable
     @projects = Project.find(:all, :order => 'name', :conditions => "status=#{Project::STATUS_ACTIVE}") - @user.projects
     @membership ||= Member.new
   end