v1.5.1

Fix: a request created by 'abap transports new' could not hold any objects.

SAP creates the task as 'Unclassified' no matter what the newrequest payload asks for, and an unclassified task rejects every object with 'Changes to objects are only allowed in correction/repair'. The task is now classified with a follow-up changetasktype call (S for workbench, Q for customizing), and the request is read back after creation because the create reply names no task.

Known limitation, now documented: objects in a local package can only live in a local request, and this API always produces a transportable one.