Add continuous integration / automated builds (e.g. Travis CI)

[hjacobs]

PyParallel should have automated CI builds (and unit tests including flake8 checking) to ensure reasonable code quality.

[zsquareplusc]

Configured Travis CI, though there are not really any useful tests yet.
As there is no hardware available on the CI servers, the question is what useful tests can be added...

Do you have a config for flake8 on Travis CI at hand?

[hjacobs]

@zsquareplusc I'm usually using the same config for tests and flake8: https://github.com/zalando-stups/senza/blob/master/.travis.yml

• run unit tests with py.test
• run flake8 via python setup.py flake8
• configure flake8 via tox.ini (if necessary, e.g. to increase max line length to 120 chars, https://github.com/zalando/connexion/blob/master/tox.ini)