Zoldak/quiet fast acceptance

@wedaly 

Verbosity 1 will only give dots, but it also does not let you know the name of the failed scenario. So it's not enough info.

Verbosity 2 seems like the minimal we can go with. It gives info like this on success (this snippet is just for login.feature, to give you an idea):

Login to an unactivated account ... OK
Login to an activated account ... OK
Logout of a signed in account ... OK
Login with valid redirect ... OK
Login with an invalid redirect ... OK

1 feature (1 passed)
5 scenarios (5 passed)
31 steps (31 passed)
(finished within 22 seconds)