Stop considering a transaction that needs 3DSecure authentification as successful in Be2Bill gateway
Added a helper to handle 3DSecure authentification requests in Be2Bill gateway
Merge branch 'master' of github.com:michaelbaudino/active_merchant

Conflicts:
	lib/active_merchant/billing/gateways/be2bill.rb
Added tests for `response_requires_3dsecure?` method in Be2Bill gateway
Simplified some tests for Be2Bill gateway