Merge branch 'release/1.1.0' into develop
Merge branch 'hotfix/1.1.1' into develop
Added gateway spec, config pattern implementation and updated gateway supporting the new pattern
updated purchase model to follow AR style pattern
Updated models to become 1st class citizens/objects (no namespaces)
Updated refunds flow
Updated card model to follow AR pattern. Added config check to raise exception if gateway is accessed before configuration
Merge branch 'feature/config-pattern' into develop
Merge branch 'hotfix/1.1.2' into develop

Conflicts:
	lib/fat_zebra/gateway.rb
Merge branch 'hotfix/1.1.3' into develop

Conflicts:
	lib/fat_zebra/gateway.rb
	lib/fat_zebra/models/card.rb
	lib/fat_zebra/models/purchase.rb
Merge branch 'master' into develop

Conflicts:
	lib/fat_zebra/models/card.rb
Big updates to models and operations (gateway now defers to models for operations, instead of gateway
Merge branch 'hotfix/1.1.4' into develop

Conflicts:
	lib/fat_zebra/models/card.rb
Updated purchase model to include validation
Version bump and doc update to 2.0.0
Merge branch 'release/2.0.0'