Supports payment by stored card and not the default card for clients with multiple stored cards.
adds recurly

Conflicts:
	Gemfile
	lib/spree_gateway/engine.rb
Correct typos
Fix incorrect error predicate on Recurly account
Handle exceptions when billing info is invalid
Correct params to initialie Billing Response

This was actually raising an exception when generating the AVSResult object. It was expecting a hash of options, not a result string
Accommodate existing profiles on Recurly
Fix variable assignment