Work on barcode number generation.
Normalize code for barcode module.

Conflicts:
	ChangeLog
	htdocs/product/fiche.php
Work on barcode number generation.
Normalize code for barcode module.
New: Generation auto of barcode is available for product.

Conflicts:
	htdocs/product/class/product.class.php
	htdocs/product/fiche.php
	htdocs/societe/soc.php