Make erinyes scale with alignment abuse

Consistent with their mythological role of punishing those who had
violated societal taboos -- oathbreakers, hosts who attacked their
guests, etc -- erinyes scale with the cumulative amount of alignment
abuse the hero has committed over the course of the game.  This is
tracked separately from the alignment record, and cannot be cleared by
the hero improving her favor with her god via "good deeds" as the normal
alignment record can.  Erinyes will gain abilities, levels, and attacks
as the hero's alignment abuse worsens.  They will also aggravate
monsters when near the hero.

src/monmove.c

@@ -639,6 +639,10 @@ dochug(register struct monst* mtmp)
         return 0;
     }
 
+    /* Erinyes will inform surrounding monsters of your crimes */
+    if (mdat == &mons[PM_ERINYS] && !mtmp->mpeaceful && m_canseeu(mtmp))
+        aggravate();
+
     /* Shriekers and Medusa have irregular abilities which must be
        checked every turn. These abilities do not cost a turn when
        used. */