Updated submodules

* data c41f42a...1f399c4 (7):
  >  Updated xml files

* src/main/web 7c2eb57...9e89bbf (1):
  > Fix: DocTranscripts w/o images could throw an exception

* src/main/xproc c14be5c...cddcea9 (9):
  > Updated bibliography from wiki
  > Updated oxygen project
  > Fallback docTranscriptNo for pages w/o docTranscripts.
  > Add revisionDesc template
  > Rename extract_testimony-letter
  > Explanatory comments for testimony extraction
  > Adapt p.i.
  > Rework of letter testimony extraction
  > Original script for extraction of letter testimonies