Allow for calling out Entity mages in /castp
Some fixes in case a non-Player Mage gets a Wand

Which shouldn't really be able to happen...
Fix Entity Mages being created on damage

It'd be cool to let the Mage handle damage and combust for Entities,
but I'll need a way to check for an existing Mage first since this
auto-creates. That's probably a better approach in general.
Implement MageController.isMage