Pulling In xtreme-roland-lopes:master: Collaboration Support, Automatic Access Token Refreshing, Recursive Delete

I've pulled in the changes from xtreme-roland-lopes:master, this release of Ruby-Box adds support for:

* passing additional parameters into item.delete. this allows for actions such as performing a recursive delete operation on a folder: folder.delete(recursive: 'true')
* if a client is initialized with a refersh_token, an attempt will now be made to automatically refresh the token on a 401 error, and retry a request.
* You can now list collaborations, this functionality was broken.
* You can now create collaborations on a folder: folder.create_collaboration.