documentation

Pull request #2199: Feature/DEV-3994 6.0 D

Merge in WEB/documentation from feature/DEV-3994-6.0-D to release/6.0

* commit '19b0c048b1f8d6a8a3c7484b6b9acf3d9cb7424d':
  DEV 3994 improved examples structure.
  DEV-3994 improved structure and clarity.
  DEV-3994 formatting fixes.
  DEV-3994 formatting fixes.
  DEV-3994 fixing mistakes, formatting.
  DEV-3994 formatting fixes.
  DEV-3994 formatting fixes.
  DEV-3994 formatting fixes.
  DEV-3994 small corrections, formatting attempts.
  DEV-3994 comments on item key usage.