Write Tests to avoid Deployment Fuck-uppery

[deepbrook]

As detected by @rafaelcapucho in issue #18, there has been an error on pip install since the last release. Furthermore several other issues were raised, which shouldn't happen.

Therefore, basic testing should be deployed to keep shit from hitting the fan for each release.

• AssertEach Endpoint subscribes and returns Data
• Assert pip install does not fail
• Assert Authentification works properly