Enforce HTTPS on address verification calls.
Merge dev into feature/821-addr-verif-https
Merge branch 'dev' into feature/821-addr-verif-https

Conflicts:
	src/classes/ADDR_SmartyStreets_Gateway.cls - resolved in file.
Merge pull request #825 from SalesforceFoundation/feature/821-addr-verif-https

Enforce HTTPS on address verification calls.
Merge dev into feature/822-addr-verif-credentials