Remove hashie gem dependency
Add standalone_mogrations gem as dependency
Add standalone_migrations test setup
Add sqlite3 gem dev dependency
Add pry-byebug as dev dependency
Fix README - make Player object identifier be an integer only
Add standalone_migrations rake tasks
Add *.sqlite3 to .gitignore
Make User class in specs an ActiveRecord::Base subclass
Add Session.vim to .gitignore
Set table prefix for P4::Chips models
Add ActiveRecord::Base support to P4::Chips module
Refactor spec/chips_spec.rb
Add P4::Chips::Transaction model