Update accounting language

BadPixxel-develop

Conflicts:
	htdocs/langs/en_US/categories.lang
	htdocs/langs/fr_FR/categories.lang

Remove full descriptions from the product list in the contract card

Patch 27

user email (this open the road for SSO).

increase fieds size of ref supplier (order and bill)

increase ref fields size (like customers facture)

extend ref fields size (like for customer commande)

increase size of ref supplier (some supplier are very long ref...)

develop

and __METHOD__ for syslog

Problem with transifex in french, the file is in french language on the website but in github, still in english...

Delete of Multilangual fields was missing, impossible to delete category.

Fixed Error : 
Cannot delete or update a parent row: a foreign key constraint fails (`Dol-3.6`.`llx_categorie_lang`, CONSTRAINT `fk_category_lang_fk_category` FOREIGN KEY (`fk_category`) REFERENCES `llx_categorie` (`rowid`))