User groups branch added.

git-svn-id: http://redmine.rubyforge.org/svn/branches/work@1372 e93f8b46-1217-0410-a6f0-8f06a7374b81

groups/db/migrate/039_create_watchers.rb

@@ -0,0 +1,13 @@
+class CreateWatchers < ActiveRecord::Migration
+  def self.up
+    create_table :watchers do |t|
+      t.column :watchable_type, :string, :default => "", :null => false
+      t.column :watchable_id, :integer, :default => 0, :null => false
+      t.column :user_id, :integer
+    end
+  end
+
+  def self.down
+    drop_table :watchers
+  end
+end