Ponder - make feed stories and emails a bit better

Summary: Also some random cleanup now and again. Note reply handler stuff is kind of bojangles bad right now. It didn't work before though either so hey.

Test Plan: asked questions, answered questions, edited answers... the feed pleased my eye

Reviewers: epriestley

Reviewed By: epriestley

CC: Korvin, aran

Maniphest Tasks: T3653

Differential Revision: https://secure.phabricator.com/D7027