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/items/storage/ItemSpatialStorageCell.java

@@ -181,7 +181,7 @@ public class ItemSpatialStorageCell extends AEBaseItem implements ISpatialStorag
 		return new TransitionResult( false, 0 );
 	}
 
-	public World createNewWorld( final ItemStack is )
+	private World createNewWorld( final ItemStack is )
 	{
 		final NBTTagCompound c = Platform.openNbtData( is );
 		final int newDim = DimensionManager.getNextFreeDimId();