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/parts/automation/UpgradeInventory.java

@@ -46,7 +46,7 @@ public abstract class UpgradeInventory extends AppEngInternalInventory implement
 	public UpgradeInventory( final IAEAppEngInventory parent, final int s )
 	{
 		super( null, s );
-		this.te = this;
+		this.setTileEntity( this );
 		this.parent = parent;
 	}