Default configuration for HTML

XML Worker uses HTML `TagProcessors` in the `HtmlPipeline` to convert HTML to PDF. The default configuration uses the following settings:

- XML Worker will look for CSS styles in the head tag (external or internal), and for styles in individual tags (e.g. `style="margin:15px"`). If no styles are defined, the default CSS of Firefox 4 is applied.
- XML Worker will automatically create bookmarks for header tags `h1` to `h6`.
- XML Worker will only add images to the document if they are defined using a fully qualified URL.

Let's take a look at a first example.