Incorrect calculation of total games vs downloaded games.

[Nevsor]

When downloading lichess or chess.com games of a player the number of downloaded games is higher than the number of total games.

I am investigating the source of the discrepancy right now and will hopefully have a PR that fixes this soon.

Example:

[Nevsor]

Identified sources of discrepancy:

1. For lichess accounts en-croissant downloads correspondence games, but does not use the number of correspondence games to calculate the total number of games. After accounting for correspondence games the number of downloaded games is still off-by-one.

[dav1312]

#54 (comment)