Don't check for switched wands in wand inventory

It'd be really nice if there was an equip event for all instances of
"item in player's hand changed".
Don't deactivate/reactivate wands on spell add

This is still needed in the configure/upgrade/combine commands for the
mana system. Now that haste is no longer an issue, that's all that's
left.
Store owner UUID as well as name.

Key ownership off UUID (with a lot of migration hacks...), but keep
display name for messaging (even if it may get out of date, not looking
up a fresh name each time!)
Make sure to put items in a Mage's stored inventory if they have one.