Bug fix release for #529

(Plugin only release, change doesn't affect CLI.)

Installation instructions:

Calibre Plugin:

Install attached plugin zip file, or use Calibre's 'Get plugins' feature.

Command line interface:

FanFicFare is delivered as a pip Python package.

pip install FanFicFare
or
pip install --upgrade FanFicFare
...to update.

(pip will automatically install dependencies.)

Run fanficfare -h from command-line.

Changes:

• Fix for Reject list not working for new users/libraries.