noseOfYeti creates a custom Python codec that lets you write your tests using an
RSpec inspired DSL (i.e. `describe` and `it` blocks). It uses the fact that you
can register a codec that is able to modify a Python file before executing it.
Using this we can make it so that when Python imports a file with a particular
encoding as the first line of the file it will be intercepted and potentially
rewritten into something else before the import continues.

noseOfYeti uses this technique to translate from the DSL it defines, into
Python classes and functions that then will be executed by your test framework
of choice.