WIP 0.0.2
Integration with powa
Add option "pg_qualstats.resolve_oids".

This options stores the object names alongside their Oid. It eats up much more
RAM, but the results can be used directly on any database.
Add "pg_qualstats.track_pg_catalog".

This option allows the user to ignore queries made against the system catalog.
It helps to keep only relevant quals.
Integration with powa: new approach
Fix mixup between allocated sizes
Powa integration bis
powa pg_qualstats
Minor fixes
pgindent
Ajout d'une fonction pour suggérer des indexes.