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/ContainerPriority.java

@@ -36,10 +36,10 @@ import appeng.util.Platform;
 public class ContainerPriority extends AEBaseContainer
 {
 
-	final IPriorityHost priHost;
+	private final IPriorityHost priHost;
 
 	@SideOnly( Side.CLIENT )
-	public GuiTextField textField;
+	private GuiTextField textField;
 	@GuiSync( 2 )
 	public long PriorityValue = -1;