Hints for celluloid in main

Hints

• asv-developer-name-tag-deprecated
  io.github.celluloid_player.Celluloid.appdata.xml:270 -
  The toplevel `developer_name` element is deprecated. Please use the `name` element in a `developer` block instead.
• asv-screenshot-media-url-not-secure
  io.github.celluloid_player.Celluloid.appdata.xml:815 - http://celluloid-player.github.io/images/screenshot-0.png
  Consider using a secure (HTTPS) URL to reference this screenshot image or video.
• asv-screenshot-media-url-not-secure
  io.github.celluloid_player.Celluloid.appdata.xml:855 - http://celluloid-player.github.io/images/screenshot-1.png
  Consider using a secure (HTTPS) URL to reference this screenshot image or video.
• asv-screenshot-media-url-not-secure
  io.github.celluloid_player.Celluloid.appdata.xml:896 - http://celluloid-player.github.io/images/screenshot-2.png
  Consider using a secure (HTTPS) URL to reference this screenshot image or video.
• asv-url-not-secure
  io.github.celluloid_player.Celluloid.appdata.xml:937 - http://celluloid-player.github.io
  Consider using a secure (HTTPS) URL for this web link.
• asv-url-not-secure
  io.github.celluloid_player.Celluloid.appdata.xml:938 - http://github.com/celluloid-player/celluloid/issues
  Consider using a secure (HTTPS) URL for this web link.
• asv-developer-info-missing
  io.github.celluloid_player.Celluloid.appdata.xml -
  This component contains no `developer` element with information about its author.