split changelog classes into their own namespace

The remaining functions in inc/changelog.php should be moved into a
utility class.

Merge branch 'master' into psr2

* master:
�� (Draft) Fix exception when actually viewing a draft of a page
��(Draft): Add doc block for constructor
✅ Add unittest for deleteUsers remote API ca

Merge branch 'master' into psr2

* master:
�� (Draft) Fix exception when actually viewing a draft of a page
��(Draft): Add doc block for constructor
✅ Add unittest for deleteUsers remote API call
fix remote API call dokuwiki.deleteUsers
translation update
�� Use json for the response to dw_locktimer
✨(dw_locktimer) plugins may reuse to add fields and callbacks
�� (editor) draft status is semantically not part of the toolbar
�� Create new Draft class and move draft handling there
translation update
correctly avoid notice in init.
avoid creating expensive stacktrace in dbg_deprecated()
add method to EventHandler to check if an event is actually handled
introduce INFO_DEPRECATION_LOG event

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Merge branch 'master' into psr2

* master:
fix: throw RemoteAccessDeniedException if not admin
feat(RemoteAPI): Add call to delete Users to the remote API ✨
removed obsolete language files
tr

Merge branch 'master' into psr2

* master:
fix: throw RemoteAccessDeniedException if not admin
feat(RemoteAPI): Add call to delete Users to the remote API ✨
removed obsolete language files
translation update
decrease php versions by one
appveyor: updated PHP versions
another try at fixing appveyor php downloads using curl

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PSR-2 compatibility for the remote API libs