work around for dealing with a multipart/related multipart upload instea...

...d of a multipart/form-data. Was trying to integrate file upload support for the HipChat v2 API with will and discovered that requests can't deal with the type of multipart request their upload api requires.

https://www.hipchat.com/docs/apiv2/method/share_file_with_room

I think this approach is a complete mess... but not sure about the best way to go about dealing with it.