Format / Sort COMMITTERS.md; Add Yujie Chen to Active list
Review Request #4382 - Created Nov. 16, 2016 and submitted
|Nick Howard (Twitter)|
|jsirois, yujiec, zundel|
Before, the list was newline separated. Unfortunately this renders into html as a single line. This change switches to using *s instead. It also adds Yujie Chen to the list.