Added datev upload to NTS

Signed-off-by: Malte Sussdorff <malte.sussdorff@cognovis.com>
Allow Admins to delete absences.

Signed-off-by: Malte Sussdorff <malte.sussdorff@cognovis.com>
Fixed bug when admin views an absence

Signed-off-by: Malte Sussdorff <malte.sussdorff@cognovis.com>
Updated to latest version of timesheet management

Signed-off-by: Malte Sussdorff <malte.sussdorff@cognovis.com>