Fix: [ bug #1380 ] Customer invoices are not grouped in company results
report
(cherry picked from commit bd061f4)
Merge pull request #1636 from marcosgdf/cp-1380

Fix: [ bug #1380 ] Customer invoices are not grouped in company results report (cherry picked from commit bd061f4)
Update changelog
Fix: mb_strtolower function does not exists on all PHP versions.

Conflicts:
	htdocs/core/lib/pdf.lib.php
Fix: Log of leaves was broken on some mysql versions.
Fix: Remove debug
Fix: Table holiday_user was not initialized anymore.

Conflicts:
	htdocs/holiday/class/holiday.class.php
	htdocs/holiday/fiche.php
Fix: Holiday module was broken. Initializaion of amount of holidays
failed.
Qual: Removed had coded value for version.
Fix: Clean data init
Merge branch '3.4' of git@github.com:Dolibarr/dolibarr.git into 3.4
Merge remote-tracking branch 'origin/3.4' into 3.5
Fix: Clean data init
Merge remote-tracking branch 'origin/3.4' into 3.5
Fix: Clean data init
Merge remote-tracking branch 'origin/3.4' into 3.5
Fix: Clean data init
Merge remote-tracking branch 'origin/3.4' into 3.5
Fix: Removed table of external modules
Fix: Removed table of external modules