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.
The problem with this is that if we release 0.3.0, someone following 0.2.0 docs will get 0.3.0 image and that will break things confusingly. So maybe we need to include version number in the box name? Or switch back to have package version specified in this Vagrantfile.