complete paths and file parts of session04 assignment

These are the first two parts of the last session04 assignment, but does not include the "dict" changes to mailroom
note you don't need the global here, either -- and it fact, it's not getting used at all, as it's spelled wrong! What you've done is create another  global name: donation_db, which you then don't use.

no harm, no foul, but...