Removed class NonConsumableItem.

* NonConsumableItem class, and all its references, was removed.

* Added new method to StoreInfo, isNonConsumableItem, which checks if a given PurchasableVirtualItem is a non-consumable item.
Currently a non-consumable item is defined as a LifeTimeVG with PurchaseType of PurchaseWithMarket.

* build directory created with changes above
Tracking NonConsumableItem class removal changes
Changing MARRIAGE_GOOD decleration to kNonConsumable.
Minor change in finalizeTransactions
Change in finalizeTransaction: check if item balance is exactly 1
New static library
Function isNonConsumableItem name changed to isItemNonConsumable
Update core lib
Advance submodule
Removing NonConsumableItem left overs from MuffinRushAssets
README.md modified with clarification regarding creating a non-consumable item.

It's important to understand that the user has to define the product as Non Consumable on iTunes connect as well as define it as LifeTimeVG with
PurchaseType of PurchaseWithMarket.
Removing NonConsumable leftovers from MuffinRush example.
NonConsumableItem removed from project file
Merge branch 'master' into nci_to_ltvg

Conflicts:
	build/libSoomlaiOSCore.a
	build/libSoomlaiOSStore.a
Changed product_id in function
New lib libSoomlaiOSStore.a after merge
README.md updated
Modified version in changelog
Updated README and changelog
README modified