Ability to validate against the normalized input

Useful in the scenario when you want to allow
555 555 5555 # 10 digits are extremely common in the US
even though it would fail Phony.plausible?().

After normalizing for “US”, this would pass.
i.e. Phony.plausible?(PhonyRails.normalize_number)
Merge pull request #64 from dimroc/validate-normalized-input

Ability to validate against the normalized input