Generates dummy data in various formats (currently only JSON implemented) based on user-defined model strings.

To use:

>>> dd_model = '''
... {
...     "name": "{% first_name %} {% last_name %}",
...     "dob": "{% date %}"
... }'''
>>> from dummy_data import json
>>> json(dd_model)
'\n{\n\t"name": "John Cleese",\n\t"dob": "10/27/1939"\n}'