Refactored AEConfig (#2633)

Added a singleton getter instead the public field.
Reduced all fields to private.
Replaced field access with getters.
Added setters where necessary (Dimension/Biome Registration)
Added config options to disable more features.
Splitted Enum name from the config key.
Changed FacadeConfig and Networkhandler similar to AEConfig.init().

src/main/java/appeng/loot/ChestLoot.java

@@ -79,7 +79,7 @@ public class ChestLoot
 								new LootCondition[0],
 								new RandomValueRange( 1, 4 ),
 								new RandomValueRange( 0, 2 ),
-								"AE2 Dusts"
+								"AE2 DUSTS"
 						)
 				);
 			} );