Add Country to family records

* add new 'Default Country' setting
* add new rake task 'onebody:set_country' for setting country on all records
* add country field to family records
* simplify i18n on family fields
Pass country to mapquest geocoder

* fixes #251
* fixes #239
Merge pull request #273 from churchio/geocode-country

Add country to family records and pass to Mapquest for geocoding