Add rspec and capybara
Add cucumber and database_cleaner
Config rspec with database_cleaner
Add guard
Fix Tab key
Modify .rspec
Add spork and factory girl
Visitors can make orders
Customers can place group orders
Add more test cases on balance calculator
Customer can make transfer
Don't create new user when return user orders
Don't create new user when return user orders
Don't create duplicate items when name+price combo found
Orders can only be group ordered once
Add specs to items
Cleanup cucumber scenarios
Validate user model
Validate transaction
Validate user more