Feature/941 cicero avs

# Warning
# Info
This change enables the use of Cicero for address verification.  Under NPSP Settings > People > Address Verification, set the Verification Service field to Cicero, the Auth Token field to your Cicero account's API Key, the Address Verification URL to https://cicero.azavea.com/v3.1/legislative_district

Addresses now include an additional TextArea field called Mailing Street2.  This allows addresses to support multiline street addresses.  The first line should still be put in Mailing Street, and any subsequent lines in Mailing Street2.  The system now correctly handles multiline street addresses from both the Contact and the Household Account.

Remote Site Settings for both the Cicero API and the Google API are now included in the managed package so you can use these address verification services.

# Issues
fixes #941 
fixes #952