Supvisors

* Auto-refresh button added to all pages.

* Web UI Main page reworked by adding a subdivision of application in node boxes.

* Fix exception when exiting using `Ctrl+c` from shell.

* Fix exception when rules files is not provided.

* Fix [Issue 81](https://github.com/julien6387/supvisors/issues/81).
When **Supvisors** logfile is set to `AUTO`, **Supvisors** uses the same logger as **Supervisor**.

* Fix [Issue 79](https://github.com/julien6387/supvisors/issues/79).
When `FATAL` or `UNKNOWN` Process state is forced by **Supvisors**, `spawnerr` was missing in the listener payload.

* Useless folder `rsc_ref` deleted.

* `design` folder moved to a dedicated *GitHub* repository.

* 100% coverage reached in unit tests.

* Migration to **Python 3.6**.
Versions of dependencies are refreshed, more particularly **Supervisor 4.2.1**.

* CSS of Web UI updated / simplified.

* New action added to Host Process page of WebUI: `tail -f stderr` button.

* New information actions added to Application page of WebUI:

* `description` field.
* `clear logs`, `tail -f stdout`, `tail -f stderr` buttons.

* Fix [Issue 75](https://github.com/julien6387/supvisors/issues/75).
**Supvisors** takes into account the `username` and the `password` of `inet_http_server` in the `supervisord` section.

* Fix [Issue 17](https://github.com/julien6387/supvisors/issues/17).
The user selections on the web UI are passed to the URL.

* Fix [Issue 72](https://github.com/julien6387/supvisors/issues/72).
The extra arguments are shared between all **Supvisors** instances.

* `README.rst` replaced with `README.md`.

* Coverage improved in tests.

* Docs target added to Travis-CI.

Initial release.