feat (Loot) : only interesting loot

 - Loot only equipments the player can equip.
 - Loot only recipes the player has the profession for or didn't already learn.
feat (Loot) : custom rates for loot by quality

Can set the minimum drop rate for quality uncommon+ loot.
fix (Loot) : remove filtered loot from containers

Fix the bug when a container contains only filtered loot and doesn't disappear.
fix (Config) : add configuration entries for loot.
feat (Loot) : add option to limit number of same items looted