Maigret

* added JSON export formats
* improved tags markup
* realized username detection in userinfo links
* added DB stats CLI option
* added site submit logic and CLI option
* added Spotify parsing activation
* main logic refactoring
* fixed Dockerfile
* fixed requirements

* improved sites list filtering
* pretty console messages
* Yandex services updates
* false positives fixes

* added support of custom cookies
* fixed lots of false positives

* tags and custom data checks bugfixes
* added parsing activation logic

* added report static resources into package

* added HTML and PDF report export
* fixed support of Python 3.6
* fixed tags filtering and ranking
* more than 2000 sites supported
* refactored sites and engines logic
* added tests