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/client/gui/implementations/GuiQuartzKnife.java

@@ -81,7 +81,7 @@ public class GuiQuartzKnife extends AEBaseGui
 			{
 				final String Out = this.name.getText();
 				( (ContainerQuartzKnife) this.inventorySlots ).setName( Out );
-				NetworkHandler.instance.sendToServer( new PacketValueConfig( "QuartzKnife.Name", Out ) );
+				NetworkHandler.instance().sendToServer( new PacketValueConfig( "QuartzKnife.Name", Out ) );
 			}
 			catch( final IOException e )
 			{