Restore extra_applications back to [:logger] only

Set `:store` to `nil` again

Take into account max_pages for worker

Change `:store` and improve `max_pages` test

Add a test case for `301` redirect

Add `:retries` option

Adjust page counting

Fix changelog [ci skip]

Prep for v1.5.0

Add the ability to scope the fetched links

Prep for v1.4.0

Add the ability to share queue between multiple crawlers

Tweak example code

Tweak logger levels

Remove blurb from changelog [ci skip]