show warring message for https://github.com/g0v/twlyparser/issues/14

- There are several format of discussion report id that the parser
  does not support.
add get-source-pdf
update unoconv to xrmx/unoconv that supports lodev
1. fix index.json. 2. put .sh and .php to script. 3. move data/index.extra.json to data/extra/index.extra.json. TODO: ensure everything is ok.
improve data/index.json and data/gazettes.json. add gen-source-html-all2.sh for each doc. TODO: ensure the scripts are correct.
Merge branch 'master' of https://github.com/g0v/twlyparser
improve parse-list.ls (parse-list_hsiao.ls). TODO: finish format-committee-log.
add comments of gen-source-html series scripts
fix special chars in index.json and integrate with index.extra.json
1. parser_hsiao.ls can't replace parser.ls. 2. remove most console.log