Add simplecov
Upgrade ruby to 2.1.4
Uncommented deprecation warnings for transpec
Convert specs to RSpec 3.1.7 syntax with Transpec

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

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

* 4 conversions
    from: describe 'some model' { }
      to: describe 'some model', :type => :model { }

* 3 conversions
    from: describe 'some controller' { }
      to: describe 'some controller', :type => :controller { }

* 2 conversions
    from: describe 'some helper' { }
      to: describe 'some helper', :type => :helper { }

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