make convertDoc work on ubuntu as well.
make prepare-source write to index.json directly like others
all in one helper
fix typo
skip when list and files are available
update index and chute-map to 4031
when converted html is present, skip fetching doc
disable chute for bills for now
use explicit splice to workaround lsc 1.1.1 issue
remove README.extra.md temporarily to be consitent. TODO: add extra index back
refactoring fixup/fixupHtml
Merge branch 'parse-list3' of https://github.com/chhsiao1981/twlyparser into parse-list3