This patch adds a very simple controller and template to allow patron
slip printing without all the boilerplate.
See bug 31713 for an example use.
Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
