Create request to create a request to itunes verify api.

>>> from itunesiap import Request
>>> request = Request(raw_data) # base64-encoded data
>>> receipt = request.verify()
>>> print receipt.product_id # any other values are available as property!

Practical useful values are: product_id, original_transaction_id, quantity, unique_identifier

Set verification mode for production or sandbox api. Review mode also available for appstore review.

>>> from itunsiap import Request, set_verification_mode
>>> set_verification_mode('review') # enable both production and sandbox for appstore review. 'production', 'sandbox' or 'review'
>>> receipt = Request(raw_data).verify()