Backlog

Methods for handling backlog:

Method	Description
tasks.api.scrum.backlog.add	Adds backlog to Scrum.
tasks.api.scrum.backlog.delete	Deletes backlog.
tasks.api.scrum.backlog.get	Returns backlog field values by Scrum ID.
tasks.api.scrum.backlog.getFields	Returns available backlog fields.
tasks.api.scrum.backlog.update	Updates backlog.