Version 1.1.2. Minor bugfixes.

Version 1.1.1. Fix to the cost-based algorithm API.

Version 1.1.0. Cost-based layout.

Fixed setuptools packaging script.

Version 1.0.0-alpha. Refactored code to expose layout algorithm integ…

…ration points.

Test fixes.

Version 0.11.9. Minor metadata update.

Version 0.11.8 (added pyproject.toml)

Minor Travis-CI-related fix

Added a __version__ field