[GREENFOOT-356] Add class library for import (similar to image library)
Add a class library, very similar to the image library, which allows users to add common helper classes (smooth mover, etc) to their Greenfoot scenarios.
All of the code for this is already in Greenfoot, we just need to decide which classes to include in the distribution (and perhaps polish the interface slightly).
Issue metadata
- Issue type: Task
- Priority: Medium
- Fix versions: 2.2.0