Restore inapp GUID correctly (bug 1058112)

Store data from receipts was not parsed correctly.
Merge pull request #28 from kumar303/receipt-guid

Restore inapp GUID correctly (bug 1058112)
full product info for purchase cb (bug 1056416)
Merge pull request #27 from kumar303/purchase-info

full product info for purchase cb (bug 1056416)
Toggle simulated products (bug 1052160)

- Add checkbox to toggle simulated products
- Reconfigure and refetch when toggled
Merge pull request #29 from JaredKerim-Mozilla/1052160

Toggle simulated products (bug 1052160)