##Requirements
- Deposit and Withdrawal
- Account statement (date, amount, balance)
- Statement printing
In order to save money
As a bank client
I want to make a deposit in my account
In order to retrieve some or all of my savings
As a bank client
I want to make a withdrawal from my account
In order to check my operations
As a bank client
I want to see the history (operation, date, amount, balance) of my operations