Added new UnitySPLogin class
Removed: all the references to ItemData as a gameObject/monobehaviour.
Added: grid example scene for item containers.
Merge branch 'Grid_System' into UnityUI
Added new SPLogin implemented with new UnityUI
Merge branch 'UnityUI' of https://github.com/SocialPlay/CloudGoodsSDK into UnityUI

Conflicts:
	Assets/Resources/SocialPlaySettings.asset
	Assets/UnityVS/Editor/UnityVS.VersionSpecific.dll
Updated the login UI to be more mobile friendly
Added new drag drop component for the new Unity 4.6 UI