Clean up new fulfilment system
 * Move pdf generation to fulfilment_group controller
 * Remove group function from fulfilment and change fulfilment group view to be equivalent
 * Don't add zero qty items to fulfilment
 * New Boarding Pass template
 * Rename boardingpass files to be pdf to match controller function
 * Move lca2013 specific files to theme
 * Change title of non-lca specific boarding pass to zookeepr
 * Fix references to templates in admin controller
Merge pull request #251 from iseppi/fulfilment-subsystem

Fulfilment subsystem
Merge pull request #69 from zookeepr/master

Merge upstream to lca2013