Synopsis:	batch [heldback_name]

Description:	Starts the batch mode by creating a new batch or, depending on the existing
				held back batches, re-activates one.
				If there are no held back batches this command invoked w/o arguments
				will start a new batch. If there is an unnamed held back batch, this
				command will re-activate it. If there are named held back batches,
				they can be activated by executing this command with the name of the
				held back batch as the argument.

Arguments:

	heldback_name	- optional, the name of a held back batch.