Tidied creation of new user entries in various dicts so they now all occur in the same place
Added more comments
Generosity calculation now also returns dict containing number of outgoing (non-wangbot) transactions per user, so calling function can optionally calculate average generosity per transaction for each user
Removed erroneous line which was adding an additional 1 to each generosity calculation
Added version number to CorcoranIndex.py
Added CorcoranIndexTest.py support for the user of average generosity calculations