treedrawing.js: fix bug
treedrawing.js: leafOrNot: add
treedrawing.js: select error node in nextValidationError
annotald/data/scripts/treedrawing.utils.js: change API of scrollToNext slightly
news.txt: small tweak
NEWS.rst: add
delete news.txt
setup.py: add news to online description
__init__.py: increment version
treedrawing.py: fix small formatting bug in console message