Logging for Steps

[bruderol]

It might be helpful to see some additional scenarioo log info for steps (e.g. to see progress during one e2e test execution):

• e.g. similar to jasmine's . (in green) and F (in red) progress log for scenarios, it might be helpful to have the same for steps in e2e-tests.
• on the other hand: all this step logs on same line might look ugly, if there are other log outputs during test execution. Therefore we should carefully introduce such things. Better think hard about it.

This is a left over from #23