Start of foia contact scraper migration. Addition of travis

Incomplete efforts to rewrite https://github.com/18F/foia/blob/master/contacts/contacts.rb as part of the django project -- this more or less completes the "department" aspects. Slight tweaks to original ruby code, but mostly the same flow, just broken out a bit more. Uses beautiful soup 4.

Added some tests, sets up travis, and included a test settings file. The file uses the same "secret" key found in the dev settings file and an sqlite db.