init v2.0.9
improved `merge`
improved `merge`
updated ranges db
updated PKG-INFO
close 2.0.9 (NOT RELEASED)
init v2.1.1
updated PKG-INFO
clear logic
threaded calls in `merge`
updated README (more dev notes)
updated README
added a config (for manage keys)
`isbndb` works if you enter API key
updated READMEs (more dev notes)
updated READMEs (more dev notes)
updated READMEs (more dev notes)
updated CHANGES.txt
WPDataNotFoundError
threads only wait for 9 seconds