Run the tests

We use pytest, but unittest is still the used style. I plan on linking this codecov or similar.

Tox is used by Travis CI to run tests on python 2.7, 3.4 and 3.5

Full test on your machine

cd test
py.test --cov=debinterface test

To have it work with breakpoints

cd test
py.test --cov=debinterface test -s