Started RSpec 3 upgrade path.
Removed use of its.
Reduced describe blocks with a single example.
Replaced should with is_expected.
Merge branch 'master' into rspec_update
Upgraded to RSpec 3 and fixed deprecation.
Updated Travis config.

Bumped Rubinius version to fix Travis error and to get it to install locally.
Fixed Hound feedback.

Using square brackets for percent literals makes sense because they're shorthand for an array, but we'll stick with the community style decision.
Merge pull request #32 from gwagener/rspec_update

Upgraded to RSpec 3