Merge pull request #1799 from FHenry/3.5

 Fix : Fusion PDF button on unpaid invoice is no more displayed
Merge pull request #1801 from fmarcet/develop

Fix: Optimize Price by Customer
Merge pull request #1802 from FHenry/3.6

Fix extrafield parameters for sellist
replace with space by tab
Fix: Field must be invisible
Uniformize field list
Merge branch 'develop' of git@github.com:Dolibarr/dolibarr.git into develop
Try a fix when timezone string is not standard

Conflicts:
	htdocs/includes/adodbtime/adodb-time.inc.php
Revert "Add Reduction value in pdf"

This reverts commit 0b5707c1cf7f057fa6c2d5bce21cafd0d7bba5be.
New: Add option to foce delivery receipt to yes
Merge remote-tracking branch 'origin/3.5' into 3.6

Conflicts:
	htdocs/compta/facture/impayees.php
	htdocs/core/lib/functions.lib.php
	htdocs/main.inc.php
Merge remote-tracking branch 'origin/3.6' into develop
Merge branch 'develop' of github.com:Dolibarr/dolibarr into develop
New: Prepare to be able to defined a bcc for each type of email sent
from dolibarr.
Add comment
Prepare to be able to send bcc according to email type.
New: Can defined a bcc for each email type.
Fixed typo
Prepare table for email templates.
Fix : warning was not calculated on the right date