Updating tests to run for minitest

When I cloned the repository and ran `rake` I encountered problems
getting the test to run. I didn't have the proper gems installed.

So this commit is to migrate the tests from the previous format to
a format that can build with a recent version of minitest.
Adding Travis configuration

This could be viewed as an optional commit, but I'm a proponent of
letting travis verify that the build is successful.
Merge branch 'updating-tests-to-run-with-minitest'

* updating-tests-to-run-with-minitest:
  Adding Travis configuration
  Updating tests to run for minitest