[llamabeast]

Inevitably, a quick bugfixing release, motivated mainly by the Ulmish Tower Shield bug.

v1.91 fixes the following bugs:
- Ulmish Tower Shields were obscenely good (I had been using them for tests of spells which were stopped by shields)
- Army of Statues had no description
- Erroneous spells "Paralyze Statues" and "Heal Statues" were visible
- Curse of Blood still costs 66 slaves, was meant to be changed to 99
- Medallion of Vengeance used the bearer's strength to determine damage
- EA Agarthan netters had wrong stats

In addition a couple of design changes:
- Polypal Spawn no longer sacred. An earlier CBM had made them sacred but that no longer seems good with them being amphibious.
- Fay Boars have reduced rather than zero upkeep.
- Locus of the Seal has misc slots only.