add w1 and webmoney integrations

set version to 1.9.1 (support rails 3.2) and add :description key into options of helper

set version to 1.9.1 (support rails 3.2) and add :description key into options of helper

fix class_inheritable_accessor to class_accessor

fix class_inheritable_accessor to class_accessor

'merchant'

Most Russian stuff is offsite, actually

readme about added billings

Added following gateways: beeline, interkassa, liqpay, robokassa, premium, qiwi, masterbank, euroset

Added ability to pass parsed post params to return

Added checking of IP address of gateways without any other authorization

Updated new BIN ranges of Maestro, Discover, Switch and Solo cards.

Packaging for release 1.9.0

Updated changelog and contributors

Added SagePay Form to README.rdoc.