Added Ruby 2.1.0 and 2.1.1 to Travis config
Convert specs to RSpec 2.14.8 syntax with Transpec

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

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

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

* 4 conversions
    from: obj.should_receive(:message)
      to: expect(obj).to receive(:message)