[#17] WIP: Cannot override the receive method of RSpec::Mocks::Syntax.
[#7] Pass: I should be able to use the RSpec's new expect syntax with VerifiedDouble.
[#7] Require verified_double/rspec_configuration to integrate verified_double with rspec.
[#7] Update features/verified_stubs.feature: Use allow syntax instead of stub.
[#7] Use expect syntax in own tests.
[#7] Fix RSpecMocksSyntaxOverrides: expect, allow, and receive should ignore plain rspec doubles.
[#7] Convert some should_receive calls to expect syntax.
[#7] Update README: add usage and update tested rspec version.
[#18] UNSTABLE. Update cucumber tests: test for existence of unverified signatures
  instead of absence of them. Determines if a stub or mock was recorded.

  UNSTABLE: "Stubbed doubles using hash syntax" found failing.
[#18] Fix Scenario: stubbed doubles using hash syntax