Fix: Syntax sql error when adding/editing line of contract and when
company does not use vat.
fix [ bug #749 ]
Merge pull request #714 from FHenry/3.3

fix [ bug #749 ]
Fix: no null into not null field
New: Add link to check professional id for india.
Fix: Missing genereic translation
Merge remote-tracking branch 'origin/3.3' into develop