Upgrade to RSpec 2.99.
Fix RSpec 2.99 deprecations.
Convert specs to RSpec 2.99.0 syntax with Transpec

This conversion is done by Transpec 2.2.1 with the following command:
    transpec

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

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

* 2 conversions
    from: pending
      to: skip

For more details: https://github.com/yujinakayama/transpec#supported-conversions
Update RSpec gems to 3.0.
Merge branch 'rspec-3'