2.7.76 released April 23, 2000

- revised assertions in add_stone() and remove_stone()
- declaration and initialization of color_has_played moved from interface/
  to engine/
- hashtable_clear no longer crashes if passed a NULL pointer
- warning if hashtable allocation fails
- new database matching step in the fuseki module
- new experimental option --fusekidb to enable fuseki database matching
- new program patterns/extract_fuseki.c which compiles a fuseki database
  in patterns.db format from a collection of game records
- new pattern databases fuseki9.db and fuseki19.db containing 9x9 and
  19x19 fuseki databases respectively
- bugfix in influence.c to stop a single stone from claiming the whole board
- libengine is now built before the patterns/ subdirectory is compiled