2.7.98 released May 22, 2000

- false marginals are renamed false margins
- eyespace search revised in mouse_determine_life
- new file regression/expected
- new targets in regression/Makefile
- regression/games/false_marginal.sgf renamed regression/games/marginal.sgf
- mouse tuning
- several new files in regression/games
- several new tests in regression/mouse.gtp, regression/eyes.gtp, and
  regression/reading.gtp 
- new GTP commands trymove, popgo, dump_stack, increase_depths, and
  decrease_depths
- new function gtp_decode_move() in interface/gtp.c
- ko eyes assigned to a dragon so halfeye analysis is performed
- old regression files in regression/obsolete/ removed