Update 2014-09-25-citizen-journalists-meetup-writeup.md

- Add promotion on today.code4.hk
- Add "與綠色記者陳曉蕾合作建立公民記者網站" as Code4HK 's project in progress
- Add link to blog post "全民皆拍的共監視時代，你準備好了嗎？" in Further Reading