Add methods for creating and requesting payments for IAPurchases
Made store id available after init and test for native IAPurchase methods.
Reflecting resource endpoint for in-app purchases in API.
Binding wrapper method for making an IAPurchase to native context.
Test for create in-app purchase token and request payment wrapper method.
Test for init method now also check that storeId is available next to accessToken.
Bump version nr
Touch up some of the doc comments
Revert "Bump version nr"

This reverts commit bc67d074c28593dcc482f79434c36008a251aee5.
Merge branch 'add-in-app-purchases' of github.com:tictail/tt.js into add-in-app-purchases
Merge pull request #2 from tictail/add-in-app-purchases

Add In-App Purchases to Native apps