This PR install protowhat through the requirements file.
Once this PR is merged into master, the shell shared image can be updated to its newest version in which the has_dir incorrect_msg argument is renamed to msg. (Which is a problem for example in ex1.11 step 3)
In a single PR I can then rename this argument and remove the protowhat installation.
This way the course works at all times.
This PR install protowhat through the requirements file. Once this PR is merged into master, the shell shared image can be updated to its newest version in which the has_dir incorrect_msg argument is renamed to msg. (Which is a problem for example in ex1.11 step 3) In a single PR I can then rename this argument and remove the protowhat installation. This way the course works at all times.