[TB] [78399060] add rake task for downloading swagger-ui
[TB] [78399060] add Rack::Swagger.app to be run in a rackup file
[TB] [78399060] some style fixes in Rakefile
[DC/TB] [78399060] add sinatra helpers & test
[DC/TB] [78399060] All HTTP verbs. No empty arrays for verbs.
Merge pull request #1 from primedia/78399060_rack_swagger

Add swagger-ui rake task & Rack app