to add

This is a bit of a scratch pad for things we are going to do to the software:

Planned changes for version 2.0:
- Add "multipart" questions like "2 + ? = 5".
- Make the cat select feedback randomly from a list so the feedback changes a little.
- Tweak the UI.

Possible ideas for the future:
- Let users select a colour from a limited list of pre-sets.