Fix #417: Rails 4 does not rewind input, causes POSTed data to be empty.
Better rewind semantics.
Added the Twitter API example to explicitly unloadable constants.
Adding 'json' gem into the spec_helper
Merge pull request #421 from ev3nly/endpoint-spec-fix

Adding 'json' gem into the spec_helper
Handle correctly nested declared params
Update CHANGELOG
Merged.
Changing README.md to place the `use Rack::CORS` code in the config.ru
rather than in the Grape::API subclass
Formatting changes to README.md
Merge pull request #424 from ev3nly/cors-doc-fix

Cors doc fix
Fix #427: handle nested parameters with arrays correctly when using declared
Merge pull request #427 from timhabermaas/fix-declared-when-given-arrays

declared(params) breaks when params contains array
Organize the release notes in fixes/features, ahead of 0.5.0.
Update README.md
Preparing for release, 0.5.0.
Bump version to 0.5.1.
Removes param memoization in Grape::Request. Closes #428
Update CHANGELOG.md
Update Exception Handling example, Closes #429