Don't send empty form fields as undefined for file uploads
Fix header response on file upload
Merge pull request #414 from mondia/master

Multi-selection in query parameter 'allowableValues' listbox for 'array' param type.
added options styling, swagger-js update, per #420
Merge pull request #418 from spil-johan/headers

Fix header response on file upload
rebuilt per #418
Merge pull request #417 from spil-johan/master

Don't send empty form fields as undefined for file uploads
rebuilt per #417