Proxmoxer

* fix for python 3.4 ([kokuev](https://github.com/kokuev))

* Https will now raise AuthenticationError when appropriate. ([scap1784](https://github.com/scap1784))
* Preliminary python 3 compatibility. ([wdoekes](https://github.com/wdoekes))
* Additional example. ([wdoekes](https://github.com/wdoekes))

* Added ignore of "InsecureRequestWarning: Unverified HTTPS request is being made..." warning while using https (requests) backend.

* Added logging
* Added openssh backend
* Tests are reorganized

* Added next tests
* Bugfixes

* Added first tests
* Added support for travis and coveralls
* Bugfixes