Generate OpenAPI spec file out of the tasks

The spec file is now enriched with the list of the tasks. The tags may be tagged.

Release v0.1.4

Improve config imports - more independence on flask.

Still fixing deployment

v0.1.3

Increment version - automatic deployment

A patch to allow pypi deploy

v0.1.2

Allow automatic pypi deployment

Fix release 0.1.1 so that it builds correctly

v0.1.1-r1

Fix tox -e check problems

Release the first functional version

CLI command for OpenAPI spec generation from persistent models

A first trial so that the Travis CI docs works

v0.1.0

Test commit for read the docs webhook II