Removed old Folder Picker sample app.
BOXContracts sample app used for Box Dev 2014 "Building For Mobile" session.

Original author Clement R:
https://github.com/crousselle/BOXContracts/
Update xcodeproject with right pointer to Box iOS SDK submodule
Update submodules as well as fix minor compile issues
Deleting BoxSDK, it has to be pulled manually
Removing .gitmodules from BOXContracts folder
Revert "Deleting BoxSDK, it has to be pulled manually"

This reverts commit 2ed7ba09b7a1c3a93c64fa8e5bc6888bfd44dbd7.
Merge pull request #8 from bsuvorov/master

Updating BOX iOS SDK Sample app