v1.1

Release of v1.1 of the Bank Management System (PRE-RELEASE).
The following includes some fixes to the code along with some additions for better accessibility and usability of the program.

• Fixed printing an empty invoice (replaced with an error message).
• Fixed error in transfer transaction where you would be able to transfer an x amount of money without actually having that money.
• Fixed deposit error message printing twice.
• Fixed formatting error in separator not being long enough in some parts.
• Removed dollar sign before currencies in foreign rate checker.
• Program creates data.txt in the current directory automatically without the need for a data folder.
• Account creation now shows a message with the new account's number for ease of accessibility.
• Fixed issue where transactions would be recorded in the invoice (even if they failed).
• Fixed issue where inputting a character or a string would break the program.
• Transactions now record the time they have been made at.
• Added more code documentation.

Full Changelog: v1.0...v1.1