Add an administrator flag to the user table.

db/migrate/012_add_admin_flag.rb

@@ -0,0 +1,9 @@
+class AddAdminFlag < ActiveRecord::Migration
+  def self.up
+    add_column "users", "administrator", :boolean, :default => false, :null => false
+  end
+
+  def self.down
+    remove_column "users", "administrator"
+  end
+end