automated testing

[ghost]

code is buggy because flesh bags are involved in its creation. metal boxes are reliable testers.

• [ ] testing strategy for python parts
• [ ] testing strategy for bash parts
• [ ] testing strategy for xslt parts
• [ ] actual tests python
• [ ] actual tests bash
• [ ] actual tests xslt
• [ ] travis setup

[tomschr]

@sknorr Thanks Stefan! :+1: I would love to see that too. I guess, we could use pytest for all the parts.