Fixes #44 - adds contact field

Adds contacts field and performs syncing update with
codeforamerica#541
Complete addition of contacts to details aside.

-  Remove unused methods and unnecessary presence check

- Clean up mail_address partial

- Add specs for all contact fields

 - Update cassette for test location
Merge pull request #45 from smcgov/44-adds-contacts

Fixes #44 - adds contact field