Revert "Restrict rails to 4.0.9"

This reverts commit c4d23312df7eca8978d2a07fc1db0778954520b7.
Cherry-picked from 2-2-dev 98f73f5915efcb2caaa1f878e9abdc17bf02c340

RSpec 3.1 support & Fix a couple Rails 4.0.10 regressions.

Conflicts:
	api/spec/controllers/spree/api/orders_controller_spec.rb
	cmd/lib/spree_cmd/templates/extension/extension.gemspec
	common_spree_dependencies.rb
	core/spec/lib/spree/core/controller_helpers/auth_spec.rb
	core/spec/lib/spree/core/controller_helpers/order_spec.rb
	core/spec/models/spree/credit_card_spec.rb
	core/spec/models/spree/order/finalizing_spec.rb
	core/spec/models/spree/order/payment_spec.rb
	core/spec/models/spree/order/risk_assessment_spec.rb
	core/spec/models/spree/order_spec.rb
	core/spec/models/spree/payment_spec.rb
	core/spec/models/spree/preferences/store_spec.rb
	core/spec/models/spree/store_spec.rb
	frontend/spec/controllers/controller_helpers_spec.rb

Conflicts:
	common_spree_dependencies.rb
	core/spec/models/spree/credit_card_spec.rb
	core/spec/models/spree/payment_spec.rb
	core/spec/models/spree/return_authorization_spec.rb
	frontend/spec/spec_helper.rb
Update specs from rails 4.0.10 regression fixes to make them pass
Merge pull request #101 from bonobos/fix-4-0-10-regressions

Fix 4.0.10 regressions