2.7.135 released July 17, 2000

- statistics functions reset_reading_node_counter() and
  get_reading_node_counter() in reading.c
- corresponding new GTP commands reset_reading_node_counter and
  get_reading_node_counter 
- all regression test files report the total number of nodes visited by
  the tactical reading 
- corrected answers to two test cases in regression/mouse.tst