Tweaks Barrelchest

The original post can be found here.
*Barrelchest respawn time is much longer, as it should have been from the start.
*Now the same person can't get two barrelchests in a row.
*Barrelchest is now the only source of Staff of Light.
*PJ timer on NPCs is now 8 seconds.
*You can once again mage NPCs.
*Respawn times on other NPCs and boss monsters should also be proper.