Hyphenation: distinguish between soft hyphen and zero-width space

Update to latest liblouis-java and jhyphen
css-calabash: add XProcSpec tests
liblouis-utils: add XProcSpec tests
libhyphen-utils: add XProcSpec tests
liblouis-formatter: add XProcSpec tests
liblouis-mathml: add XProcSpec tests
texhyph-utils: add XProcSpec tests
pef:merge: add option `level=volume|section`
fixup: 9d73ee8: allow ZWSP (U+200B) in validate-braille.xpl
pef-utils: add XProcSpec tests