Usage
<link rel="import" href="/*/single.page.application.router/single.page.application.router.html" /><single-page-application-router>
<single-page-application-route data-pattern="/index.html" data-element="page-index"></single-page-application-route>
<single-page-application-route data-pattern="/" data-element="page-index"></single-page-application-route>
<single-page-application-route data-pattern="/t/" data-element="page-thing"></single-page-application-route>
</single-page-application-router>