[ATTACHMENTS] Further refactoring

Some key points:
- Components and Plugins shouldn't extend Module directly
- Avatars should be fetched via GSActor ID, not by nickname as that isn't unique
- Avatar now is a separate Component
- Common file utilities are now to be placed in Core\GSFile, this will
  handle storage and trigger validation
- Some bug fixes

components/Bridge/Bridge.php

@@ -19,8 +19,8 @@
 
 namespace Component\Bridge;
 
-use App\Core\Modules\Module;
+use App\Core\Modules\Component;
 
-class Bridge extends Module
+class Bridge extends Component
 {
 }