Py-qgis-server

* Enforce required python version in setup.py
* Fix supports for PUT/DELETE/PATCH/HEAD HTTP methods for qgis API

* Fix Qgis server api call in management
* Add specific option for logging qgis info message logs
* Print extended version information
* Use setup.cfg for flake8 options
* Handle 0 length response from qgis server
* Expose Qgis api to public interface:
* Expose landing page (https://github.com/3liz/py-qgis-server/issues/29)

* Release on https://pypi.org

* Revert bad consistency check for postgres handler

* Add management API
* Fix `postgres` protocol (broken in 1.6 branch)
* Add `server:maxcycle` option for controlling worker lifetime
* Log failed requests (allow auditing timeout errors)