Rearange incantifier eat code

This was generating some odd messages.
Hell-only monsters should only be generated in hell :)

mkclass() was creating hell-only monsters outside of hell.
Enemy Entourage

Elvenkings should be accompanied by elves. Elvenkings were listed under the wrong monster class

Migo queens now garanteed to have philosopher escorts, as philosophers will no longer be generated alone.
Balance patch:

Minotaurs should only be auto-generated as part of maze levels in gehennom
Balance patches

Nightgaunts less frequent

Legion devil grunts are slower

uranium imps aren't generated in hell

metroids are slower

BUGFIX: metroids and baby metroids don't have heads

Hunting horrors are slightly higher level (low dungeon/return trip only)

SPELLING: change 'God' to lowercase

migo are not generated in hell,
migo philosophers not generated,
migo queens much higher level (low dungeon levels/return trip only)

Vorpal jabberwock not generated in hell (low dungeon levels/return trip only)

Garo slower, don't follow characters up and down stairs, not insubstantial
Garo master not unsolid
Keter don't have blood
Reorder migo tiles