github: Add missing python3-setuptools dependency.

Bump to version 1.1.

Bump to version 1.0

Add twine package.

travis: Return to top dir before deployment.

Bump version.

Fixes jrfonseca#24

Bump version number.

Issue jrfonseca#5.

Note on uploading to pipy (issue jrfonseca#71)

Add setup script (Marius Gedminas, issue jrfonseca#19).