Feature request: Exercises view/export

Hi,

it would be great if the Workbench could auto-generate a document or a website form course material that only shows exercises (with and without solutions).

As an example, we are holing an online workshop on Docker using The Carpentries Incubator [material](https://github.com/carpentries-incubator/docker-introduction). For this, I use the material as orientation during the course but show only my terminal over video conferencing. However, for the exercises, I would love to show participants a document with only the exercises and without the instructor text before and after it. Since the exercises are already written down in the material, it would be great to have this generated automatically.