New: add new notes system in contract and order/invoice supplier module

htdocs/comm/propal/note.php

htdocs/contrat/class/contrat.class.php

htdocs/contrat/contact.php

htdocs/contrat/fiche.php

htdocs/contrat/note.php

htdocs/core/ajax/extraparams.php

htdocs/core/class/html.form.class.php

htdocs/core/lib/contract.lib.php

htdocs/core/lib/fourn.lib.php

htdocs/core/tpl/contacts.tpl.php

htdocs/core/tpl/notes.tpl.php

htdocs/fourn/class/fournisseur.commande.class.php

htdocs/fourn/class/fournisseur.facture.class.php

htdocs/fourn/commande/contact.php

htdocs/fourn/commande/fiche.php

htdocs/fourn/facture/contact.php

htdocs/fourn/facture/fiche.php

htdocs/fourn/facture/note.php

htdocs/install/mysql/migration/3.1.0-3.2.0.sql

htdocs/install/mysql/tables/llx_commande_fournisseur.sql