DayOfWeek is an enum as defined at https://schema.org/DayOfWeek
We missed the PublicHolidays enum value when building
`getDaysOfWeekWithMondayFirstWeekDay()` which is used in templates to
get ordered result.
Opening hours for public holidays were not rendered, which is now fixed.
That ensures grouped output of related offers.
Offers are not sorted in any way and might end up in entry, parking,
entry, etc. Sorting ensures all of same type are rendered one after the
other, entry, entry, parking.
Sorting is done by alphabet on the technical enum value.
- Removed individual converters for TYPO3.
Conversion is now handled in a single converter.
- The new converter will import necessary dependencies upfront, e.g.
town or organisation.
- Move import state into extra class.
Relates: #34
That's necessary as models grow.
Added features should be tested to not break with future changes.
The tests revealed an existing error in fallback which got fixed to make
new test pass.
Relates: #18
Allows to import entity of type TouristAttraction.
Right now only in German, as this is most important.
Add output of tourist attraction via custom content element.
