2.7.50 released March 17, 2000

- new option --showtime makes genmove report its time
- new option --hurry decrements depth parameters
- hurry can be set during ascii play
- new global variables hurry and showtime
- gg_gettimeofday made global
- new global variables nominal_depth, nominal_backfill_depth,
  nominal_fourlib_depth, and nominal_ko_depth