Update bills.lang

Ligne 252 : Changement grammatical
- de "Paiements issue de l'acompte"
- en "Paiement issu de l'acompte"
Merge pull request #1821 from astebert/patch-1

Update bills.lang
Avoid missing class error for fetch_thirdparty method
Not need to test if class exists with require_once
Fix Error when trying to clone an Order
Fix: Pb in management of "or" ("|") for permission check.
Merge branch '3.6' of git@github.com:Dolibarr/dolibarr.git into 3.6
Fix: box of customer and propsects were not correctly disabled.
Fix: box of customer and propsects were not correctly disabled.
Fix: wrong function name
Fix right on product list
Add function dolEscapeXML
Merge branch '3.5' of git@github.com:Dolibarr/dolibarr.git into 3.5
Revert "Add function dolEscapeXML"

This reverts commit 756b1d31ad24a7908a875e180ebc7a759ef31311.
Reload object when product clone failed (cause of ref already exists) if
not done result is blanck pages (header wannot be rewrite (location
herder index.php) around line 1542
Merge pull request #1961 from FHenry/3.6

Fix right and error management
Merge pull request #1943 from ndrosis/patch-9

Fix Error when trying to clone an Order
Update changelog
Merge branch '3.6' of git@github.com:Dolibarr/dolibarr.git into 3.6
 Avoid missing class error for fetch_thirdparty method