Incorparate changes from criteo guys

[gthieleb]

The criteo guys also maintain a fork of python-consul [1].
The fork already contains some nice features e.g. for context manager and consul connect.
It would be great to see the changes incorporated in your project.

[1] https://pypi.org/project/py-consul/

[nzlosh]

Perhaps contact the cretio developers and invite them to join this project as official maintainers? More official maintainers mean less risk of project getting stuck like python-consul, which had 3 maintainers when it died.