* Refactoring in preparation for AMP support
* infrastructure for AMP validation
* Add Metrika counter on AMP page + adjust layout
* more content fixes
* improve amp layout
* improve navigation
* Move converting admonitions to generation time
* strict amp test check
* Batch AMP validation
* Add date published/modified to docs articles and their ld+json meta
* few more content fixes
* improve ld+json meta
* adjust margins
* skip published/modified for stable release docs
* adapt single page mode
* update po
* skip published/modified for single page docs
* update po
* adjust layout
* adjust layout
