fix B03007 - monster gender handling + level follower tuning

fix B03007 - monster gender handling + level follower tuning

     Fix the reported problem of combat messages referring to Orcus as
"it" when the data.base entry uses "he"; extend use of gender-specific
pronouns to named and other unique monsters as well as to humanoids.
If any of those should stay as "it", they'll need to be M2_NEUTERed....

     And prevent level followers from chasing you across levels if they
are fleeing at the time.  It's an old change I've been sitting on which
is not related but happens to be right next to the pronoun code.