Replace NYC memorial (over) with SF memorial (tonight)

Note that I am not an organizer or otherwise affiliated with this event, but it has been advertised publicly on a number of sites, so it seems only fitting that it be listed here, especially as the event is tonight.
Merge pull request #93 from zachlipton/patch-1

Replace NYC memorial (over) with SF memorial (tonight)
Add SF memorial video.
Move SF Memorial to a post
Fix ampersands
Fix parsing error
Fix width of SF memorial video
Use youtube link
Allow fullscreen
Updated DN video to full length embed
SF Memorial page
Added live stream link to DC memorial.