workflows: Holding Pen table speed upgrade

• Reduces the number of ajax requests triggered in Holding Pen interface.

• Adds WorkflowBase class that define the basic function a workflow needs to render correctly its processed objects.

• Upgrades Holding Pen to print correctly the changes.

• Adds the functions needed to the basic workflows.

• Adds task results to workflows management functions for updating progress bar in Holding Pen.

• Moves brief formatting to the workflow instead of the BibWorkflowObjects to allow everybody to choose their way to format them.

• Various fixes to Holding Pen JavaScript.

Tested-by: Jan Aage Lavik <jan.age.lavik@cern.ch>
Signed-off-by: Guillaume Lastecoueres <guillaume.lastecoueres@cern.ch>