Version 1.03 complete!

What's new in version 1.03:
- The system has been made more modular, allowing the user to customize how they want prices changed and for which products instead of having everything hard-coded.
- Any functions more than 50 lines long have been broken up into multiple smaller functions for readability.
- New class added to hold all user choices: UserInputs.
- Many variable and function names have been changed for clarity.
- Totals: The system now uses 2 classes, 23 functions, and 625 lines of code (including comments and whitespace).