This node type represents <meta> or <link> (transparently, based on the
style attribute). I had to make two node types for this and hack the
toData conversion code directly into ve.dm.Converter, because we don't
have native support for node types that can be both inline and block.
(We should add this in the node API rewrite.)
The CE implementation renders a placeholder (with the same styles as an
alien node) right now. I'm not sure how nice that is, but it's better
than rendering raw <meta>/<link> tags.
This whole thing is a total pile of hacks to make VE deal with
<meta>/<link> tags until we have a proper node types API.
Change-Id: Id6783fcfc35a896db088ff424ff9faaabcaff716
