Fix a few Rubocop style warnings.
Bump up Ruby 2.1.x version to 2.1.4
Merge pull request #470 from petergoldstein/feature/travis_2_1_4

Bump up Ruby 2.1.x in Travis CI to 2.1.4
Merge pull request #469 from petergoldstein/feature/a_few_rubocop_fixes

Fix a few Rubocop style warnings.