Adding some test coverage to hub solo

as well as:
* removing unused/old NewRelic bit
* changing around the interaction between `.travis.yml` and
  `build.sh` to make the latter more natural to interact with as a
  human &lt;/opinion&gt;
Merge pull request #33 from travis-ci/db-adding-some-specs-to-hub-solo

Adding some test coverage to hub solo
Upgrading to jruby-1.7.16
Merge pull request #36 from travis-ci/db-jruby-upgrade

Upgrading to jruby-1.7.16
Trying to whack some moles on heroku
Merge pull request #37 from travis-ci/db-heroku-unfuddle

Whacking some moles on heroku