added hp column to users table
set default value to users table's some columns
modified default value in users table
backbone modules is no longer read from application.js
implemented monster battle
added exp column to users table
moved battle implementation from controller to model
show user's lv, hp, exp in home view
added items and inventories table
moved seed csv files under the seed directory
removed unnecessary comments
added type column to items table
test user is created when rake db:seed
added item model handles items table
defined item type
create initialize items
added nokogiri gem
added awesome_print gem
added element, slot column to items table
create item data downloading rake task