Compatibility with DokuWiki release "Librarian"

Replace calls to deprecated functions.
Thanks to https://github.com/WolfsGitHub for the fixes.

Add the Title type

[title] is similar to [ref], but uses the page header as captured in entry_title for the label of the link.

Fix typo

Support the hint in ref typing

In the [ref::namespace] typing, the namespace hint was not taken into account.

Fix previous update for PHP7 backward compatibility

Support enum from different namespace

By prefixing the hint for an enum with :, allow to fetch it from an absolute namespace.

Support use in root namespace.

Update enum.php

Render enum types as a link to the enumeration table

First publication