issues-backup

new method:

1. start a local server in folder, or npm run bank.
2. click fetch to load latest data of issues.
3. clik download and save them in folder (overwrite).
4. git add . & update~

Old method:

little script with bookmarklet for backup issues: https://gist.github.com/Rplus/63d9c66afa6bd35b778e