User groups feature initial commit.

git-svn-id: http://redmine.rubyforge.org/svn/branches/work@1373 e93f8b46-1217-0410-a6f0-8f06a7374b81

groups/db/migrate/094_add_users_group_id.rb

@@ -0,0 +1,9 @@
+class AddUsersGroupId < ActiveRecord::Migration
+  def self.up
+    add_column :users, :group_id, :integer
+  end
+
+  def self.down
+    remove_column :users, :group_id
+  end
+end