2.7.57 released March 27, 2000

- doc revision
- compile_for_match() called again after running mouse code from genmove()
- mouse_genmove() removed from utils.c (was unused)
- doc/MOUSE and doc/INFLUENCE removed from distribution, all material is
  included in the Texinfo documentation
- matchpat aborts if color==EMPTY
- mouse_attack returns true if trymove captures
- unnecessary test eschewed in mouse_find_lunches
- corrected: debug flag set wrong in main.c with --mouse