MW Extra plugins

From the MediaWiki extension repository (https://www.mediawiki.org/wiki/Category:All_extensions):

• CrossReference
  • https://www.mediawiki.org/wiki/Extension:CrossReference
  • Simple unpack in extensions folder
• MathJax
  • https://www.mediawiki.org/wiki/Extension:MathJax
  • FIXME: Document how to get the "stored" version from our own repos...
  • See issue https://github.com/McStasMcXtrace/McWeb/issues/64
  • Consider upgrade to mediawiki > 1.23 and the Math extension and MathML
  • • See https://www.mediawiki.org/wiki/Extension:Math
• Lockdown
  • Download via https://www.mediawiki.org/wiki/Special:ExtensionDistributor/Lockdown
  • Simple unpack in extensions folder
• ?? UMEduWiki?? - seems not needed
• Try https://www.mediawiki.org/wiki/Extension:PdfBook for rendering all pages as PDF...
  • Only for mediawiki > 1.23 it seems... :-(

OWA from https://github.com/padams/Open-Web-Analytics/ (last semi-functional "official" version was 1.5.2... Let's try with their "bleeding edge" stuff...)

piwik from http://piwik.org