Removal out of the Dicom Dictionary of non dicom 'fourth' field

Removal out of the Dicom Dictionary of non dicom 'fourth' field
Add         to the Dicom Dictionaty of Dicom 'Value Multiplicity' field

Commenting out of probabely useless methods :
  Dict::GetDictEntryNames()
  Dict::GetDictEntryNamesByCategory()
  DictSet::GetPubDictEntryNames()
  DictSet::GetPubDictEntryNamesByCategory()