2.7.15 released January 6, 2000

- cleanup in configure.in
- configure tests for random and alarm
- embedded newline removed from a string in mkeyes.c
- extra pair of braces to avoid ambiguous else in optics.c
- compiler warning about snprintf eliminated from ttsgf.c
- documentation about dragon.status and dragon.weak revised in docs/DRAGON
- attack() is more cautious about snapbacks
- dragon_status() revised to consider a missing case
- docs/PATTERNS fully revised
- slight revision of the definition of higher order liberties, in an attempt
  to fix escape_route problem
- reading depths increased with the number of explicitly placed stones
  in autohelpers
- minor cleanup in utils.c
- patterns shuffled around in patterns.db and patterns2.db
- two extra matching pattern steps to modify eyespaces, patterns temporarily
  hosted in conn.db
- not_lunch patterns moved to conn.db and matched together with eye space
  modifying patterns
- autohelpers can now also be used in conn.db patterns with no '*'
- minor revision of escape.db
- dont_attack_helper removed since it was no longer in use
- remaining references to EXPERIMENTAL_MOVEGEN removed
- bugfix in add_half_eye()
- new function make_proper_eye_space() in optics.c for use from autohelpers
- tuning