complete meta data of news websites in refs; cope with link-templates
see https://de.wikipedia.org/wiki/user_talk:lustiger_seth#Weitere_Medien
- get current ref-content of a page
- decompose template (such as Internetquelle or webarchiv), keep order and whitespace
- fetch meta data from external website
- if there is new informaten: add parameters to template
- replace old template with improved one