Update and rename TPE Price Updater.py to TPE Price Changing Tool.py

Things that changed in version 1.02:
- Refactoring: Changed project and directory name to "TPE-Price-Changing-Tool" and main source file to "TPE Price Changing Tool.py"
- Fixed bug that was allowing final prices to end with "0.99". In any such case the price will now increase by $1.00.
- Added the getUserInputs() function to ask whether the user wishes to update single-pack and/or multi-pack items.
- Modified the changePrices() function to update prices based on getUserInputs()