New features

Big release, lots of outstanding issues have been resolved.

The UI has changed slightly, the Custom Publish page in the admin is now an overview table of all types, with 'Add a new option' tab in the top right.

The permission to access and use this has been changed from 'administer nodes' to 'administer content types' to make it a bit more friendly without requiring god level access.

First alpha release for Simple hierarchical select for Drupal 8.

Changes since 7.x-1.6-rc2:

- #2661964 Entity API module support
- #1988730 Add display as follow button.

Improvements:
Refactored how primary_keys are passed.
Implement hook system for other module can extend integration.
Added commerce_billy support
Added commerce_message support