It's four pointers, twice as much as what would be acceptable. Not sure
why this happened, maybe because all those cases used an ArrayView
before and so I just changed the type without considering the difference
in its size?
Unfortunately this change also means a bump in the plugin interface
string, thus all scene converter plugins have to be updated as well.
This allows people to directly pass Containers::Array<Trade::MeshData>
there, without having to put them to an annoying temporary
Containers::Array<Containers::Reference<const Trade::MeshData>.
The Iterable header is included for backwards compatibility, apart from
that there should be no breaking change.