Adapted from Sandro Mancuso's bank-kata-outsidein-screencast.

Learn and practice the double loop of TDD Test application from outside, identifying side effects

Create a simple bank application with the following features:

• Deposit into Account
• Withdraw from an Account
• Print a bank statement to the console

Statement should have transactions in the following format:

DATE       | AMOUNT  | BALANCE
10/04/2014 |  500.00 | 1400.00
02/04/2014 | -100.00 |  900.00
01/04/2014 | 1000.00 | 1000.00

Start with a module with following function signatures:

module AccountService =
    Deposit: Amount -> unit
    Withdraw: Amount -> unit
    PrintStatement: unit -> unit

You are not allowed to add any other public functions to this module.

NOTE: In order to keep the exercise simple, use an int-alias (Amount) for money and string-alias (Date) for dates. Also, you can ignore the formatting of the statement (spaces between pipes and words, etc).