0.256

- Moved appendix with case studies to end of user guide, now appears as
Appendix F. (bugreport style sheet is now Appendix E.)
- Two more case studies of selnolig's actions: Goethe's "Faust", Parts
1 and 2 (ooh!)
- Further restructuring and simplification of parts of user guide,
better explanation (I hope) of why morpheme boundaries rather than
syllable boundaries matter for ligature suppression