OAIHarvest: holding-pen UI bugfixes
- Adds new JS scripts (jQuery UI accordion) in order to fix the currently broken UI interface. (closes #1041)
- Changes some functions in getHoldingPenData and adds a new function perform_request_gethpall to adopt to the updated UI.
- Adds some new CSS classes.
- Fixes some kwalitee warnings.
Tested-by: Tibor Simko <tibor.simko@cern.ch>