Update patch level of ruby

To equal the version of ruby used for Big Maven™
Upgrade ruby-version to latest ruby (2.1.4)

Skip what big Maven is on, and go for the latest, most performant,
securest ruby yet.
Remove backbone from build/vendors

Nothing should be committed to the build/ directory. This being there
was causing an issue when trying to build the gem.

See the discussion in pull request #44:
https://github.com/mavenlink/brainstem-js/pull/44
Merge pull request #44 from mavenlink/update-ruby

Update ruby
fixed a bug where nested filters were not being cahched correctly
add pairs and clean commented out code
fix erroneously doing a test inside a function
Merge pull request #47 from mavenlink/time_submission_approvals

Time submission approvals
Merge branch 'master' into custom_params

Conflicts:
	.pairs