miscutils: obsolete files cleanup

* Removes dateutils files.
BibTasklets: consyn ignores more index pages

* Ignores pages with title "Preface", "List of participants"
  and pages with titles starting with "Papers"

Signed-off-by: Jan Aage Lavik <jan.age.lavik@cern.ch>
BibHarvest: zenodo2inspire filter

* Introduces a new filter for OAI harvesting of Data records
  from Zenodo.

* The script tries to link with articles using DOIs and arXiv IDs.

Co-authored-by: Jan Aage Lavik <jan.age.lavik@cern.ch>
BibHarvest: fix matching in Zenodo filter

* Amends the collection name from DATA to Data when matching
  against existing Zenodo data records.

Signed-off-by: Jan Aage Lavik <jan.age.lavik@cern.ch>