Currently running full regression suite on Travis requires a bit of manual work, described in:

https://gist.github.com/mnocon/6b67ca7981200dfe0b424c7c2c0c338b

We should be able to automate parts of this doc into a Command that will make the whole process a lot easier.

Goal of this task: investigate/design how the Command could look like, if possible: prepare a proof-of-concept solution.