Add status_dict

- Add terms.csv (한영변환)
- Extract tables with single function (and different xpaths)
    - '접수'
    - '위원회 심사'
- Separate status_dict and status_timeline
Split status_timeline to statuses, status_infos
Fix bug in summary downloader

- Wrong filename
Apply basedir to html file directory
Fix bug for cases where summaries don't exist but summary columns exist
One bill per json file

- 기존에는 100bills/json
Parsing parallelization
Add file descriptions