Hints for 0ad in main

Warnings

• asv-screenshot-no-media
  :36 -
  A screenshot must contain at least one image or video in order to be useful. Please add an <image/> to it.
• asv-screenshot-no-media
  :37 -
  A screenshot must contain at least one image or video in order to be useful. Please add an <image/> to it.
• asv-screenshot-no-media
  :38 -
  A screenshot must contain at least one image or video in order to be useful. Please add an <image/> to it.
• asv-screenshot-no-media
  :39 -
  A screenshot must contain at least one image or video in order to be useful. Please add an <image/> to it.
• asv-mimetypes-tag-deprecated
  :90 -
  The toplevel `mimetypes` tag is deprecated. Please use `mediatype` tags in a `provides` block instead to indicate that your software provides a media handler for the given types.