Remove DependencyFactory

- Include all necessary classes in `dependencies.config.php`
- Add DI-reference to BaseObject (acts as a global registry)
- Refactor all static "init()" methods to use the global registry

- Refactor Logging for Worker-Logger a little bit

src/Database/Database.php

@@ -56,8 +56,6 @@ class Database
 		$this->readServerVariables($server);
 		$this->connect();
 
-		DBA::init($this);
-
 		if ($this->isConnected()) {
 			// Loads DB_UPDATE_VERSION constant
 			DBStructure::definition($configCache->get('system', 'basepath'), false);