v0.17

• needs libfolia 2.9 or above
• replaced TravisCI by GitHub actions
• FoLiA-correct:
  • fixex a problem with correcting FoLia with both p and s nodes
  • added support for the FoLiA 'tag' feature
  • clearer error messages
  • fixed bugs in HEMP handling
  • better handling of Ucto's ABBREVIATION* tokens
  • fixed corrections when a word has 'space="no"'.
  • some smaller fixes
  • added more tests
• FoLiA-clean:
  • improved, using new features from libfolia 2.9
• FoLiA-2text:
  • replaced '--original' parameter by a '--correction-handling' parameter
  • implemented a --honour-tags option, to interpret tag="token" tags
  • some improvement in output-file naming
• FoLiA-abby:
  • complete reworked the code
  • added '-S' and '-C' as alternatives for '--setname' and '--classname'
  • added a --keephyphens option
  • added a --addbreaks option
  • addes option --addmetrics to optionally add positional info to the
    paragraphs
  • improved handling of '-' (Hyphen)
  • add 'font_properties', 'font_id' and 'font_style' as a feature node
  • improved handling of text with spaces at 'unexpected' locations
• all modules:
  • Code refactoring and cleaning
  • added and improved tests
  • adapted man pages