Spell Totems, AE conversion into REs

New Spell Totems allow us to leave persistent Radius Enchantments
anywhere we wish. These invisible objects propagate spell effects in a
radius around themselves until they expire. For simplicity's sake, I
created an "Old Style AE" setting that will ignore range checks and 100%
simulate current Area Enchantments - but with our new checks and
conditionals tech.

Spell Totems can also be used to create AE effects in an area of any
shape or size. For example: perhaps dark angels have a Darkness aura
around themselves, or perhaps going near the giant statue in Avar
Village brings you in range of a Killing Fields aura.

As three test cases, I have converted AMA, Truce, and Killing Fields
into persistent REs. I did not modify what they do, instead opting to
completely simulate old AEs for now. Truce, has, in fact, been restored
to its old functionality - both PvE and PvP. The spell is much smoother
with the new conditionals, and shouldn't pose a mule problem.