Scanless

- Remove `hackertarget` module, see 26
- Minor fixes / formatted code with `ufmt`

* Formatted code using [black](https://github.com/psf/black)
* Discontinued Docker support (Dockerfile was outdated and would be trivial for anyone who is interested to create their own)
* Removed t1shopper (no longer functions and I've had problems with it in the past)

* Update nmap services file from 2019-05-28 to 2020-10-02 (latest)
* Fix PyPi long description to display README and as Markdown properly
* Reviewed scanners still functioning as intended

* Minor bug fix to web requests

* Add colored output to cli
* Add cli debug mode for network issues
* Remove ping.eu from code base (no longer works)
* Various code improvements & cleanup
* Replace `bs4` dummy pypi mirror package with official `beautifulsoup4` package

Completely overhauled tool.

* scanless can now be used properly as a library.
* Proper class structure with a reusable session.
* Randomizes user strings.
* Fixed a few scanners while updating.
* Better error checking / custom exceptions.
* Minimized a lot of code.
* Generates output nicely using nmap service names.
* CLI flow improvements using scanless as a library.
* Fixed license trove classifier is wrong in setup.py
* Tool is Python 3.6+ now and this is specified.
* Bumped major version.