Document how to create <polymer-element>s without Shadow DOM

[ebidel]

Overriding methods.

Polymer/polymer#222

[ebidel]

Added at http://www.polymer-project.org/polymer.html#createligthdom

[jyasskin]

Are you sure http://www.polymer-project.org/polymer.html#createlightdom addresses this bug? It explains how to create light dom instead of shadow dom, but not how to simply omit stamping out the template.

It looks like the right instruction is to override fetchTemplate() to return null.

[ebidel]

Yes, it addresses the original issue. lightdom overrides what Polymer does with the first <template>. Completely customizing that is another issue.