* Strassen::Cat: check_cat now tests complete category value,
  attributes are not stripped anymore
* data update
* Strassen::Cat::check_file: show filename if error message
* check-categories target is now done file-by-file
* Makefile: added ortsschilder to SOURCE_TARGETS
* Strassen::Cat: added check for ortsschilder
* Makefile: removed all -catrx in category checks; now everything's
  done with Strassen::Cat