Couldn't push as a PR as it's based on another PR #380

But here is the code: https://github.com/0k/cookiecutter/commits/pr-better-prompt

It uses the context argument and interpret help, default,
regex attributes.

Example::

context:
  name:
    help: "Module name (ie: sale_trinkets)"
    regex: '[a-zA-Z0-9_]+'
  website:
    help: "Website (ie: http://www.yourwebsite.com)"
    default:
    regex: '[^ ]+'

Optional values and the ones having an empty default value.
A value without default value is considered required.

If the context meta information dict is detected, it'll trigger the behavior.

There are missing tests for now, but I just wanted first to feel the heat for such PR before spending too much time on it.

It passes all normal tests and so proves that nothing tested was broken.

I guess this could be 2cents for the discussions at #30, #360, #169...

Ho, and this is a full template repo that I use with this:

https://github.com/0k/cookiecutter-odoo