embed v0.8.0 — OTE Spec 0.4.0

Changed

• The bundle now targets OTE Spec 0.4.0 (oteSpecVersion), a
  compatibility release that only relaxes validation: no field was added or
  removed, and every 0.3.0 feed this widget renders today keeps rendering
  identically. Two relaxations reach the widget — HTTP(S) URL fields validate
  as iri (a published id, url or image address may contain non-ASCII
  characters such as …/pycamp-españa), and image[] accepts http:// as
  well as https://.
• An http:// image is treated as absent on an https page. The browser
  blocks it as mixed content before a byte arrives, so an <img> there can
  only ever produce a broken frame. Cards fall back to the usual placeholder
  (or placeholder-image), and the list body and detail modal render without
  an image and reclaim its space — exactly what an event with no image looks
  like. On an http page the image is not blocked and is rendered as
  published. No feed that is valid under 0.3.0 can hit this: http:// images
  only became legal in 0.4.0.
• When an event lists several images, the first https:// entry is preferred
  over an earlier http:// one instead of the list's first entry winning
  unconditionally (@opentechevents/preview-feed's firstImage). The
  publisher's order still decides between entries the browser will actually
  load; falling through is never worse, since an https image loads on an
  http page too.

Fixed

• Non-ASCII addresses survive the render path unencoded: event-id matches an
  id containing a literal ñ (the match is exact string comparison, so a
  single re-encoding anywhere would silently empty a page pinned to one
  event), and event links and image srcs keep the spelling the feed
  published. <ote-subscribe>'s links keep encoding the feed URL exactly once
  where it is a query parameter (Feedly, OTE Reader, OTE Tools preview) and
  not at all where the scheme is swapped for a handler to open
  (webcal://, feed://, Google Calendar's cid).

Pin this build at https://tools.opentechevents.org/embed/v0.8.0/ote-events.js (and ote-subscribe.js alongside it).