Add live-updating to timestamps.
Change URL to Ad. Manual download to point at S3.
Migrate advertising page styles to LESS.
Cleanup js and unused image.
Hide 'cancel' button on edit_promo when there are no existing campaigns.
Clean up alignment on edit_promo page.
Handle long target/location values better
Move help text to infobar.
Change ad testimonials.
Replace quote cycling with new static layout.
Move timestamp `live-timestamp` class for less whitespace
Escape inlined JSPreload JSON data.
Allow certain media types to be expanded by default.

Current need: liveupdate.
Add /explore variant to next/prev suggestions.
Add iso8601 polyfill necessary for timetext in old browsers.
Quantize listing dates to "just now", like in JS.
Clean up registration/login validation errors.
Remove extra closing brace from "last edited" text.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	r2/r2/templates/useriphistory.html
	r2/r2/templates/utils.html