https://reuse.software is a way of specifying licenses in a simple way
that easily allows us to specify multiple licenses in a project and
check that we are correctly specifying our licenses
We plan to add an MIT-licensed file to the project in a future commit,
which prompted us to look at REUSE to make this simpler
We're starting to need a few packages which people are less likely to
have on their system. Let's provide an environment where everyone can
quickly install everything we need.