Implement pytest

[campb303]

A continuation of ECN/webqueue2-frontend#39

[campb303]

As with the frontend, test driven develop is too much overheard for what we get from it as a small team. It essentially creates a whole other product we need to manage in unison with the API and as we change the API's code, we must also update the tests to avoid false positives. The real test should be: does it work for the end user? Closing.