Move model loading to the correct event. Fixes #2991 (#2994)

* Use the correct event for loading models.
* Introduce IModelRegistry to wrap the ModelLoader

src/main/java/appeng/bootstrap/components/TileEntityComponent.java

@@ -15,7 +15,7 @@ import appeng.core.AppEng;
 /**
  * @author GuntherDW
  */
-public class TileEntityComponent implements PreInitComponent
+public class TileEntityComponent implements IPreInitComponent
 {
 	private List<TileEntityDefinition> tileEntityDefinitions = new ArrayList<>();