hubflow doesn't prompt on `git hf init` like gitflow does.

[oblitum]

I've just installed hubflow and, contrary to git flow which correctly stop to prompt for options on git flow init, it goes straight assuming the defaults never prompting for input.

My main issue is not being able to set release tag prefix.

I'm running Ubuntu 13.04 and git flow does not present this problem.

[stuartherbert]

Use the -a flag to prompt for options.