Update notes for submitted changes

* [added] Group members can now assist a quest owner with quests as long as the quest owner is in range of the target [fixed] Quest items can no longer be looted from corpses by anyone but the quest owner [fixed] Quest targets killed by anyone but the owner and nearby grouped members will fail the owner's quest and direct them back to the quest giver [fixed] Quest givers will send the appropriate message if they are unable to find a valid location for the quest target