server: refactored celery creation into factory; use app_context in tasks
server: nightly conversion of formats
server: fixed BROKER_URL var refs 5ed21d00
tests: no imports in test_* modules; fixtures only to manage import order issues
server: typo
tests: improve auth key test with base64 encode
tests: always show output on travis-ci.org
tests: .travis.yml in order of execution