Added check to see if membership list is empty.
Added check to see if the list of collaborators to invite are empty.
Updated Box SDK.
Updated Box SDK, again.
Reverted to data set from UbiCollab repo.
Fixed bug in Box SDK.
Fixed bug in Box SDK.
Merge pull request #65 from KatoStoelen/master

Working Box Sync
* Added pull request from Kato with some Box fixes.

* Using SDK 0.4.2.