Formatter: Progress à la Fuubar

[mackwic]

Ref: https://github.com/thekompanee/fuubar

This is hard to do, as there is many term manipulations in play. Probably needs a change in the design somewhere.

[regexident]

https://github.com/mitsuhiko/indicatif

As soon as we have parallel execution of tests (hint: sooner rather than later cough) we cannot provide pure append-only logging of parallel tests/contexts anyway. We will instead need to their wait until the very last test has finished (which is kinda bad from a user's perspective) or update the output dynamically (which has problems of its own).

[mackwic]

nice link, thanks !