* Remove `requests` dependency (https://github.com/rerobots/hardshare/issues/8).
* Provide CLI switch to change cprovider: config --cprovider
* Begin Pipfile, Pipfile.lock for installation via Pipenv (https://pipenv.pypa.io/en/latest/).
* Warn, prevent launch of sshtun connection type instances if no SSH keys.
* Improve documentation.
-- Scott C. Livingston <scottrerobots.net> Tue, 18 Aug 2020 16:54:41 -0700