BoxSharedObjectBuilder: fix small bug in body generation
that missed to derefernce JSONStructures with permissions key first.

Also wrote three test to ensure settings for canDownload, canPreview
and access are properly set.
BoxSharedObjectBuilderTests:Scrubbing name from Created by line.
Merge pull request #83 from bsuvorov/master

BoxSharedObjectBuilder: fix small bug in body generation
Compare object equality instead of pointer equality in tests

{buildfix}
Fixed XCode 5.1 warnings
Refactored the itemPicker to provide better naming, initialization methods and delegate callbacks.
Cleaned up the FilesResources manager.
Merge pull request #84 from crousselle/master

BoxDev SDK update