documentation lacks namespaces

[baukezwaan]

It seems the yml-examples lack the correct notation of the Extensions.

For example:

  extensions:
    - CatalogPageExtension
  parent_classes:
    - CatalogParentPage

should be:

  extensions:
    - LittleGiant\CatalogManager\Extensions\CatalogPageExtension
  parent_classes:
    - LittleGiant\CatalogManager\Extensions\CatalogParentPage

Or did I missed something, that it would work without namespaces in the YML?

[baukezwaan]

Sorry, see there was already a PR to fix this:

#64