Split the base box into one used for dev and one for the tutorial.

Fixes #509.

TODO:
 1. [ ] Update the documentation. (It will be the same as currently, but for both of the boxes)
 2. [ ] Update the release process to generate a new tutorial image with the just released packages.
and in the other README, s/main/development` (perhaps with some explanation about what makes it "development", ie bleeding edge package dependencies)