Move address generators to address provider
Move text generators to text provider, regroup tests
Move internet generators to internet provider, update tests
Move person-related generators to person provider, update tests
Move number generators to number provider, update tests
Add providers register function, refactor generators definitions
Add person prefix and suffix providers
Improve test helper
Add state abbr generator, improve state generator
Segregate casual helpers to separate module, add tests for helpers, add digits generator
Add catch phrase and building number generators
Add date geenrators provider
Update person provider
Add random_key and random_value helpers
Add naive tests for random_key and random_value helpers
Add payment generators provider