Fixed bugs in monitor.py which were discovered during testing. #4.
Small changes of comments in settings.py.
Integration tests of the monitor extended.

Related: #4, #16.
Added testing of settings.ISBN_PAIRING.
Added tests of settings.SAME_DIR_PAIRING and SAME_NAME_DIR_PAIRING.
Test data updated (for last time I hope).

Bump #16.
Fixed another bugs found during testing.

Bump #16, #4.
Added integration tests of import and error logs.

Bump #16, #4.
Changed standalone test.
Added tests of settings.py.