Bump version to 16.1.0
Bump version to 16.1.0-dev
Fixed references to PRs in schema.sql
Merge pull request #2748 from gratipay/fix-pr-reference-in-schema

Fixed reference to PR in schema.sql
Expanded CC form styling to two lines
JS now only allows numeric input, cuts off at maximum length
Expand CVV box to handle americanexpress cards, added reference, added reference