adjusted basic loading saving in admin

stripped out all the session stuff

added Writer class for saving the config back to file

moved the whole settings class mechanism to it's own class

created a configuration Loader class

This replaces stuff in the Configuration class that hasn't been removed,
yet.

moved php parser to it's own file

start of refactoring the config plugin

split up all the files and added namespaces. everything broken

deleted deprecated auth plugins

authmysql and authpgsql were replaced by authpdo two releases ago.

PSR-2 for revert plugin

PSR-2 for usermanager plugin

PSR-2 for authldap plugin

PSR-2 for ACL plugin

fixed auth plain test

PSR-2 for authplain plugin

PSR-2 for safefnrecode plugin

PSR-2 for authad plugin

PSR2 for styling plugin

There's currently one warning left. Supressing it doesn't work which
might be a bug in phpcs.

adjust remote plugin handling in code check

Remove z-index:1 on the border underneath tabs

adjusted phpcs config for plugins

PSR-2 for extension plugin

fixed class name

PSR-2 for authpdo plugin

PSR-2 compatibility for info plugin

PSR-2 for popularity plugin

fixed typos