Fix url params in request phase
Add BitPay adapter
Add bitpay to the sample_app
WIP - omnipay 2.0 adapters refactoring
omnipay and oneclicpay adapters
udpating sample app
fixed specs
ignore rubies < 1.9.3
fix: correctly handle double request for ipn validation
include the local reference in the callback when the payment is successful
refactor: remove the adapters implementations (keep only the core)
explicitely require openstruct, for ruby < 2.0 compatibility
refactor: coverage and code climate
refactor: more coverage