Basic example to research isomorphic metal.js usage

Execute node index.js to run the example

• metal-component::Component depends on DomEventEmitterProxy and toElement from metal-dom;
• metal-incremental-dom::attributes depends on delegate from metal-dom
• metal-incremental-dom::patch depends on append and exitDocument from metal-dom
• metal-incremental-dom::render depends on domData from metal-dom

These dependencies are just in the way, but not necessarily needed in the rendering path. In a simplistic exercise, just commenting the metal-dom imports and its usages renders ListJSX properly.

• metal-soy::Soy depends on HTML2IncDom from html2incdom which tries to set and access HTMLParser globally

In this case, on top of the changes for JSX, simply using global to export/import the parser, or properly wrapping it in a module fixes the issue and renders ListSoy properly.