updated readme

db/migrate/20110808220247_update_users_table.rb

@@ -0,0 +1,11 @@
+class UpdateUsersTable < ActiveRecord::Migration
+  def self.up
+    add_column :users, :topics_count, :integer, :default => 0
+    add_column :users, :posts_count, :integer, :default => 0
+  end
+
+  def self.down
+    remove_column :users, :topics_count
+    remove_column :users, :posts_count
+  end
+end