* Added namespace mustache to be generated
* Fixed syntax issues with package generation
* Added Response and Element mustache templates
* Added ApiClient
* Fix: Only required parameters needed for api operations
* Added documentation generated code
* Regenerated petstore samples
* Fixed url paths for operations
* Fixed based on comments in issues #6520
* Regenerated petstore samples
* add r client codegen
* update r api, model templates
* various fix
* rename Json to JSON
* more enhancements
* fix json handling
* add file upload support, var name to handle hyphen
* use httr::upload_file