Removed Ruby version patch support.

* Ruby 2.x.x+ no longer supports patch versions.
Updated Ruby version default to 2.1.2.
Updated Rails version default to 4.1.
Updated gemspec to more clearly define the spec object.
Added test randomization to spec helper.
Removed Coveralls support.

* Use Code Climate instead.
Added Code Climate test coverage support.
Updated gemspec to match gemspec template in regards to spec object.
Refactored gemspecs to use  instead of $:.