BEM-1138 — Битые ссылки на bem.info
BEM-1027 - Added meta-info for all docs
BEM-1055 articles -> article
Replace article -> articles
New tags for metainfo
Metainfo: authors -> authors' id
BEM-1102: meta-info update
BEM-1167 change in metainfo
Metainfo: small corrections
Metainfo: added order field
Removed cross-links in the end of the articles
Metainfo: corrections
BEM-1356: Content and metainfo corections
Fix broken references