aofl-element extends lit-element and overrides the _render() function. It accepts a template function and an String[] of styles. It is intented to be used in place of lit-element as the base class for elements. In it's current version it doesn't do much o
<aofl-picture> serves as a container for zero or more <aofl-source> and one <aofl-img> elements to provide versions of an image for different display sizes. Display size specific sources are defined using the media attribute of the aofl-source ele