Allow CSV import of Orgs, Locations & Addresses.

Initial setup of new import script with support for organizations,
locations, and addresses.
Check tasks with Rubocop and fix offenses.

Also update Ruby version for Travis.
Allow importing of Services from a CSV file.
Allow mail addresses to be imported via CSV.
Allow importing of Contacts via CSV file.
Allow Phones to be imported via a CSV file.
Allow programs to be imported via CSV file.
Allow Regular Schedules to be imported via CSV.
Add date validator.

This allows dates to be submitted in a few different formats, namely
month/day/year, or spelled out, as in November 17, 2014.

In the month/day/year format, both 2-digit and 4-digit years are
accepted.

The day/month/year format is also accepted, but to use it, you must
first update the `date_format` option in `settings.yml`.
Allow import of Holiday Schedules via CSV file.
Merge pull request #275 from codeforamerica/csv-import

Populate DB via OpenReferral-compliant CSV files.