Update company.lib.php
add contact tabs on company

appair only if MAIN_SUPPORT_CONTACT_TYPE_FOR_THIRDPARTIES is enabled
display on tabs adherent list of company
Update societecontact.php
Update societecontact.php
Update societecontact.php
change option name

replace
MAIN_SUPPORT_CONTACT_TYPE_FOR_THIRDPARTIES
by
MAIN_SUPPORT_SHARED_CONTACT_BETWEEN_THIRDPARTIES
Update llx_c_tva.sql
New: Each user can include its own external ics calendar into dolibarr
agenda view.
Avoid duplicate logs
Squelette plus complet.
Update project.class.php
Qual: Remove method SetBilled that is a duplicate of setStatus. 
Fix: Better management of option SendInterventionRef.
Fix: Translation
Fix: [ bug #1558 ] Product/service edit page title shows new Ref instead
of old ref
Fix: [ bug #1553 ] Saving User displays setup removes menu
Merge remote-tracking branch 'origin/3.5' into 3.6

Conflicts:
	ChangeLog
Fix: [ bug #1547 ] Untranslated Paiementfourn.class.php error messages
Merge pull request #1803 from defrance69/patch-15

add company contact tabs
Fix: Add more log and missing error message
Fix: broken feature: add param for use only "disabled" with delConstant
and "enabled" with setConstant