Polymer/ShadowDOM — pull request #380 by arv (2014-02-21 21:02:14+00:00)
Title: Implement the HTML DOM APIs

This implements the following interfaces

* HTMLTableElement
* HTMLTableSectionElement
* HTMLTableRowElement

I punted on HTMLCollection it is right now just an alias to NodeList.
HTMLTableDataCellElement, HTMLTableCellElement etc have no methods that return nodes so there is no need to manually implement these wrappers.

Fixes #366