Random choices, date generator handling and passing args/kwargs to generators

[marquicus]

Example:

schema = {
    'sexo': '(M|F)',  # produces M or F
    'edad': 'random_int(18,80)',  # passing args, see readme
    'ocupacion': 'job',
...
    'fecha_nacimiento': 'date_of_birth',  # date as isoformat
...
}

[denisesenguel]

how's this one coming along? it's so useful!