expose redirect url setter
Merge pull request #50 from box/oauthredirect

expose redirect url setter
Adds support for Groups and fixes some error handling for unknown types.
Restores BoxCollaboration.
Merge pull request #51 from box/GroupAddition

Group addition
make json parser more robust by handling unknown types for BoxTypedObject and BoxItem.
Merge pull request #52 from box/jacksonunknown

make json parser more robust by handling unknown types for BoxTypedObjec...
improve unit test
Merge pull request #53 from box/utest

improve unit test
fix of EVENTS type parsing from JSON response
Merge pull request #55 from pnedonosko/events-json-parser

Fix of EVENTS type parsing from JSON response