Upgraded to RSpec 3.0.
Fix build on Rubinius, see https://github.com/travis-ci/travis-ci/issues/2542.
Merge pull request #125 from dblock/rspec-3.0

Upgraded to RSpec 3.0.
Rewritten test example, updated README.
Merge pull request #126 from dblock/test-example

Rewritten test example, updated README.
Added ability to change the description and parameters of the API endpoints generated by grape-swagger.