Convert specs to RSpec 3.0.0.beta1 syntax with Transpec

This conversion is done by Transpec 1.5.0 with the following command:
    transpec

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

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

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

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

* 10 conversions
    from: obj.should_not_receive(:message)
      to: expect(obj).not_to receive(:message)

* 3 conversions
    from: it { should_not ... }
      to: it { is_expected.not_to ... }

* 2 conversions
    from: it { should ... }
      to: it { is_expected.to ... }

* 1 conversion
    from: =~ [1, 2]
      to: match_array([1, 2])

* 1 conversion
    from: lambda { }.should
      to: expect { }.to
update steps for new rspec
cleanup outdated gems
Merge pull request #389 from ali-graham/rspec_3

Rspec 3