2.7.42 released March 6, 2000

- mouse goal array changed from int to char
- C patterns implemented for mouse patterns
- bugfix in mouse_defense: misplaced popgo() popped
- new function goaldump for debugging
- new function mouse_mark (like count but does not mark liberties)
- new mouse patterns
- cleanup of interface.c
- pushgo() made static
- pattern profiling output now computes the total number of hits and
  reading nodes
- O symmetry introduced in barriers.db