Bump rspec to 2.14
Convert specs to RSpec 2.14.7 syntax with Transpec

This conversion is done by Transpec 1.13.1 with the following command:
    transpec

* 37 conversions
    from: obj.should
      to: expect(obj).to

* 14 conversions
    from: == expected
      to: eq(expected)

* 6 conversions
    from: obj.should_not
      to: expect(obj).not_to