Add support for SVG

[AshleyWright]

It'd be helpful for SVG support:

const icons = [{
	"a": { "body": /*svg*/`<path fill="currentColor" d="..." />` }`
}];

or even better with the form suggested in #31

const svg = String.raw; // Serves as a string template tag function that just passes through it's contents
const icons = [{
	"a": { "body": svg`<path fill="currentColor" d="..." />` }`
}];

Presently I'm doing fine with a work around of using /* xml */ to tag these stings, but this is far from ideal.