populate: import index.json

import index.json from twlyparser into database
use uppercase for sql commands
update gazette script

use combination of gazette, book and seq as a primary key is not
enough. for example: gazette #3635, there are such records

    "gazette": "3635",
    "book": "01",
    "seq": "1",
    "type": "委員會紀錄",

and

    "gazette": "3635",
    "book": "01",
    "seq": "1",
    "type": "院會紀錄",