Cleanup that improve code readability.

- Paves way for real autoloading in the future.

- Always called utilities. We need to make sure they work
as expected. Introduce PHPUnit tests.
- Due to the use of gobals inside the static methods they
become untestable. Remove use of global but that also
forces a change if method signature.

Since there is no code style lets use PSR-12
https://www.php-fig.org/psr/psr-12/

- Fix static linked ARC2 lib in module code.
- Fix typo in index.php

- Improve readability

- Removed no longer needed inline comments.

fix to .html bookmarking after db deletion. Handles a creation of html page if it does not already exist

Revert "fix to handle bookmarked pages which has been deleted from database (.html to empty page when url exists)"

This reverts commit f75e2664.

fix to handle bookmarked pages which has been deleted from database (.html to empty page when url exists)

Loads of fixes. Redesign based around bibo:Document. Added search on person, topic and collection. Timeline on collection started, but broken.

Better prev-next links on Collection. Some changes to static pages. Better handling of searches on index.'

Currently, both formats are supported for backwards compatibility