Frenzy No-cost spells

During a frenzy, spells no longer require reagents, vigor, or mana, and
never fizzle.

Seems we're doing a large number of tweaks to frenzies, giving players
thousands of every reagent and super-food on automated timers, when
we could really just eliminate the combat delays at their source.
The super-food and the gear handed out automatically is still useful, though.