add specs
add todo: get the object passed in
Merge branch 'specs_for_issue_347' of github.com:qqshfox/grape into json-post
Fix #347: Grape will accept any valid JSON as PUT or POST, including strings, symbols and arrays. JSON format APIs will always return valid JSON.
Raw body input from POST and PUT requests and parsed body input are now available in env api.request.input and api.request.body respectively.