Reduces visibility of internal fields/methods

Reduces the visibility of all fields to private and create setters/getters
when necessary. Exceptions are fields with GuiSync as these need to be
public.

Reduces the visibility of internal methods to private/protected/default when possible.

src/main/java/appeng/container/implementations/ContainerSkyChest.java

@@ -31,7 +31,7 @@ import appeng.tile.storage.TileSkyChest;
 public class ContainerSkyChest extends AEBaseContainer
 {
 
-	final TileSkyChest chest;
+	private final TileSkyChest chest;
 
 	public ContainerSkyChest( final InventoryPlayer ip, final TileSkyChest chest )
 	{