Update ruby-activemerchant package to 1.20.0.

= ActiveMerchant CHANGELOG

== Version 1.20.0 (November 14, 2011)

* Add support for USA ePay Advanced SOAP interface [matthewcalebsmith/jduff]
* Beanstram: fix purchase with Secure Profile [pitr/jduff]
* Orbital: various fixes [Soleone]
* Add Samuari gateway by Fee Fighters [jkrall/odorcicd]
* Lock money gem to 3.7.1 or less since newer versions break in 1.9 [jduff]
* Braintree: handle gateway rejected transactions gracefully [braintreeps/jduff]
* Ogone: support different signature encryptors, custom currency and eci [ZenCocoon/rymai/jduff]
* Payflow Link: use secure token [jduff]
* Added refund method to Exact, Pay Junction and Skip Jack gateways [jduff]
* Elavon: added test url [kylekeesling/jduff]
* Fix redundent errors when credit card is expired [castiglione/jduff]
* Two Checkout: update service url [vampirechicken/jduff]

== Version 1.18.1 (September 23, 2011)

* Braintree: allow setting merchant_account_id on initialize [jduff]
* Realex: only send letters and numbers in shipping code field [Soleone]

== Version 1.18.0 (September 23, 2011)

* NoChex: Update the URL that payment requests are posted to [caseywhalen/jduff]
* QBMS: fixed test mode check [Soleone]
* Realex: encode avs info with shipping address [Soleone]
* Add Dwolla offsite gateway [armsteadj1/jduff]
* Eway: pass email, customer, description and options to store [moklett/tobi]
* New dependency: active_utils gem [odorcicd]
* Optimal Payments: fix test mode check [jduff]

(taca)