Normalizing phone numbers in our DB

[tomfbiz]

Currently we normalize phone numbers "on the way out" using our phone_number object, and the phonenumbers python package.

Generally we store phone numbers both with and without country codes, generally without any punctuation.

Should we normalize to make the phone numbers more consistent to make them searchable? Maybe we should include the country code, since we may eventually accept phone numbers that are different country than the order country.