Adds optional presenter path to rake task
Convert specs to RSpec 3.1.7 syntax with Transpec

This conversion is done by Transpec 2.3.7 with the following command:
    transpec

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

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

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

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

For more details: https://github.com/yujinakayama/transpec#supported-conversions
Version bump

Maintains backwards compatibility
Bumps the ruby version
Adds travis-ci config
Merge pull request #1 from michaelirey/optional_presenter_path

Optional presenter path