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/helpers/IContainerCraftingPacket.java

@@ -44,7 +44,7 @@ public interface IContainerCraftingPacket
 	/**
 	 * @return who are we?
 	 */
-	BaseActionSource getSource();
+	BaseActionSource getActionSource();
 
 	/**
 	 * @return consume items?