Add support for <use> elements

[meyfa]

See https://developer.mozilla.org/en-US/docs/Web/SVG/Element/use

[Corleone87]

I integrate use element

[shimbala]

Hi, any progress with this tag?

Or is there option to add some custom child (text) to node?

[meyfa]

For what it's worth, a barebones SVG\Nodes\Structures\SVGUse was added in 0bf3d0fd9160818ae4501dee2aa61b770f75b645.

Still missing:

• special attribute handling
• rasterizer support