Fix: Removed urldecode used on superglobal _GET and _POST and _REQUEST... since they are already decoded by PHP.

 comportement aléatoire avec certaines fonctions

 avec un répertoire parent en fonction de l'entité

Removed all now() and sysdate() database sql inline function by a date defined by PHP ($db->idate(mktime())).
This is to be more portable, to solve problem when database server time differs from PHP server and to prepare for TZ support.