Log Message:
Update finance/ruby-activemerchant package to 1.16.0.

== Version 1.16.0 (May 12, 2011)

* Bogus: Support referenced transactions for #authorize, #purchase, #recurring and
#credit [dasch/jduff]
* Payment Express: Update gateway url [bayan/titanous]
* Moneybookers: Send country and account_name if provided [Soleone]
* Moneris: Add Diners Club and Discover [Soleone]
* Cybersource: add auth_reversal support [jeberly/titanous]
* WorldPay: Update endpoint URLs for offsite gateway [Soleone]
* Worldpay: Add JCB and add Maestro [Soleone]
* Authorize.net: Add Diners Club and JCB [Soleone]
* Quickpay: Add testmode for subscribe and authorize [dasch/jduff]
* Orbital: fix handling of phone numbers. [ntalbott]
* Braintree: Add Diners Club [cody]
* Add ePaymentPlans offsite payment [robertomiranda/Soleone]
* Add Stripe gateway [boucher/titanous]
* Add Paystation gateway [nikz/jduff]
* Bump minimum ActiveSupport version to 2.3.11 [titanous]
* Use securerandom from stdlib not active_support [phlipper/jduff]