R1:b873f3f991b0

Conpherence V1

Summary: it's ugly. but it works. basically. See T2399 for a roughly prioritized list of what still needs to happen.

Test Plan:
- created a conpherence with myself from my profile
- created a conpherence with myself from "new conpherence"
- created a conphernece with another from "new conpherence"
- created a conpherence with several others
- created a conpherence with files in the initial post
- verified files via comment text ("{F232} is awesome!") and via traditional attach
- edited a…