NEW Support extrafields on product lot.

dev/skeletons/skeleton_card.php

dev/skeletons/skeleton_class.class.php

htdocs/core/class/commonobject.class.php

htdocs/core/lib/product.lib.php

htdocs/core/modules/modProductBatch.class.php

htdocs/core/tpl/extrafields_view.tpl.php

htdocs/install/mysql/migration/4.0.0-5.0.0.sql

.../install/mysql/tables/llx_product_lot_extrafields.key.sql

htdocs/install/mysql/tables/llx_product_lot_extrafields.sql

htdocs/langs/en_US/productbatch.lang

htdocs/product/admin/product_extrafields.php

htdocs/product/admin/product_lot_extrafields.php

htdocs/product/stock/class/productlot.class.php

htdocs/product/stock/productlot_card.php

htdocs/product/stock/productlot_list.php