Purge all .pyc files before running tests
Relocate purge function into run_tests() method.  Tidy up a progress message
Merge pull request #8 from gimick/KA_test

Purge all .pyc files before running tests

Looks great!  Let's get this in.  It will automatically become part of my pull request on the learningequality repo; when it's accepted, these will be your first commits there :)