Contains a few bug fixes:
* Do not scan external links with an http:// or https:// prefix,
which will prevent properly formatted external links from
emitting a warning for a missing link target.
* Includes an init.py for the mkdocs_ezlinks_plugin/scanners
module, which then is included into the distribution.
* Also downgrades some prior warnings to debug level,
as most of the messages trigger existing mkdocs warnings
(such as broken link warnings, etc.)
* Messages are now automatically filtered based on the
'--quiet' and '--verbose' mkdocs flags.
* Update Configuration Options in README.md