unicode_text length 1 only required for encoding
Some tests of desired behaviour (currently failing).
Register translation of \par commands during decoding; try longest matches first to fix ambiguity, also set correct state of lexer during registration.
Fix long lines to make flake8 happy.
Update changelog. [ci skip]
Merge pull request #26 from mcmtroffaes/feature/no-more-par

Decode \par commands as \n\n.