v0.19.7

Oriel 0.19.7

Added

• Media sources: an app serves <video> and <audio> bytes from its own
  code (blocks fetched from another device, a file decrypted on the fly)
  instead of files below a folder, with HTTP Range, so playback starts at
  once and seeks work. A Source gives each path's size (sizeFn, null
  for 404) and copies bytes from an offset (readFn), thread-safe. On
  desktop, media_server.Options.source serves it on the loopback server
  in place of root_dir, with the same Host check, CORS, Range, HEAD and
  416, reading up to 256 KiB at a time. On Android,
  media_scheme.setSource(source) serves it at
  https://app.localhost/media/ instead of the root until
  clearSource(): OrielMedia's stream reads through
  NativeLib.mediaSize/mediaRead, and the WebView's skip to a range's
  first byte only moves its position. Elsewhere setSource returns
  error.Unsupported.