Session05 - Final mailroom.py and safe_input.py

Final Mailroom madness and Exceptions assignments
This is certainly fine as is, but I wanted to point out that this is a good place for `*args`. If your column titles were all in a list then you could pass all of them at once:

    cols = ['Total Donations',...]
    "{...}{...}{...}{...}".format(*cols, width=col1width)