Create interactive menus

[mattstratton]

Just thinking, since we have survey, which makes for delightful prompts, perhaps we can offer the ability to just navigate the entire time, instead of always typing commands, subcommands, etc.

So it would be something like this:

$ devopsdays-cli
Welcome to devopsdays cli!
Are you interested in [e]vents, [s]peakers, [t]alks, [o]rganizers, or [p]rograms? (? for help) _ e
Great! Do you want to [c]reate a new event or [e]dit a new event? _e
...
...
Your event has been created!
[e]vents, [s]peakers, [t]alks, [o]rganizers [p]rograms, or [q]uit? (? for help) _q
See ya later, home slice!