added a gitignore file
added initial data
removed unnecessary codes
defined exps table and insert initial data to exps table
added exp model
implemented user lv up
form_for is unnecessary in home view, so use form_tag instead
added some initial data
moved implementation randomize mob to model
added equipments column to users table
set default value to items table
defined Equipment class and equipments method to get user's current equipments
user inventory association is default includes item
fixed naming about equipment