Convert specs to RSpec 2.99.1 syntax with Transpec

This conversion is done by Transpec 2.3.1 with the following command:
    transpec

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

* 9 conversions
    from: be_false
      to: be_falsey

* 8 conversions
    from: be_true
      to: be_truthy

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

* 1 conversion
    from: RSpec.configure { |c| c.color_enabled = something }
      to: RSpec.configure { |c| c.color = something }

For more details: https://github.com/yujinakayama/transpec#supported-conversions
updated to rspec 3
Fixed unit tests
Finished RSpec 3 update
updated mocha