Updated to new version

Signed-off-by: Malte Sussdorff <malte.sussdorff@cognovis.com>
Fixed Lead time, added the support to manipulate the actions to also allow cancellation of a storno workflow

Signed-off-by: Malte Sussdorff <malte.sussdorff@cognovis.com>
Fixed problem with notifications if supervisor is editing the absence.

Signed-off-by: Malte Sussdorff <malte.sussdorff@cognovis.com>
Added ability to check for the permissions on an absence, so users can't hack into the absence_ids

Signed-off-by: Malte Sussdorff <malte.sussdorff@cognovis.com>
Merge branch 'nts' of github.com:cognovis/po into nts