This patch adds new SQL schema for MySQL and PGsql. The goal is to improve the one line per entry format. There is no more a big table with all fields because this sort of storage is causing bad performance (databases don't like to have a lot of NULL fields to store).
Main changes are :
* Add new schema for MySQL and PGsql
* Use call to configurable procedure in SQL OUTPUT modules
* Arguments of a procedure are given by the list of fields of a selected table