Shopify/active_merchant — pull request #920 by odorcicd (2013-11-18 20:27:21+00:00)
Title: Payu(Paisa) refactor

@melari @jduff @bizla

Refactors PayU.IN and PayU Paisa to:
- remove secret key from productinfo
- make generation and verification of checksum more readable
- sanitize certain fields as per API docs