Qual: Start to move code of dol_print_graph function into class
DolGraph.

Conflicts:
	htdocs/core/modules/export/export_excel2007.modules.php
	htdocs/langs/en_US/errors.lang
	htdocs/langs/fr_FR/agenda.lang
	htdocs/langs/fr_FR/errors.lang

Fix : email message combined with html signature made troubles with line breaks

Add note of todo for next versions.

[ task #1014 ] Add option to recursivly add parent category

fixed bad function call causing select_produits_list to fail

Conflicts:
	htdocs/contrat/liste.php

Conflicts:
	ChangeLog