Cleanup exploration plugin
Current status.
The plugin is all red now. This can be used to do some cleanu
Task set.
- Name classes more expressively.
- Go through each class and mark the good ones YELLOW using the new rating system.
- Resolve the TODOs from the code review.
(from redmine: issue id 3200, created on 2017-11-28, closed on 2018-04-18)