add migration to set default Kuhsaft::PageType if no page_type is set
add migration to set content page_type for Pages, whereas no page_type is set
update content_page scope
update CONTENT constant from empty string to content
use new hash syntax
add default value for page_type to Kuhsaft::PageType::CONTENT

also update ruby hash syntax
remove content page_type from spec because it is now automatically set
update page model spec because of new default page type

remove it everywhere where an empty string was set
add explicit page types spec
update changelog
update ruby hash syntax
Merge branch 'features/3094_set_page_type_to_content_automatically'

Conflicts:
	CHANGELOG.md