Return fulfilment shipping methods as objects

[judgej]

The API delivers order fulfilments with a list of available shipping methods as an array of strings. The strings are to be changed to objects for two reasons:

• It makes the shipping method label available for display to the user.
• It provides a placeholder to put cost details of the varying shipping methods for each fulfilment. Costs will be added at a later time.

The object will contain properties:

• code example express
• name eample Express

[judgej]

Release 1.1.0 implements this issue.