Initial commit for mailroom.py. Establishes initial donor data, first user choice working, basic send_thank_you_note() functionality is stubbed in and working.
Switched initial menu to T an R. Checking for existing donor, adding new donor, and adding new donation amount are now working.
Added email printing, added ability to quit from original prompt.
First pass at create report. Math working, report title working, needs report formatting.
Report formatting complete. Tested going back and forth between adding data and printing report, all tests passed so far.
Enhanced 'Thank You Note' menu/UX readability, expanded 'quit from anywhere' functionality.
Added donation input validation, tweaked UX.