Optional tests

[wolf99]

On the C track we have extra optional testing that a student can run if they wish.
It tests with memcheck to check if there are memory leak errors. This is not required for a solution to pass, but a student can run and conform to it if they so chose.

Is it possible for some argument be added to the interface to allow this optionality?

[iHiD]

Yeah. Nice idea.

We'll add something like this, but I don't exactly know what or where this will live yet. For now, I'd build it without it, and then let's come back to it after the Experiment, where we'll learn lots about how well these are working in practice