2.7.151 released August 9, 2000

- regression framework revised, temporary .gtp and .res files no longer
  needed
- cleanup of patterns/patterns.db
- experimental code for doing sgf dumps of reading variations in memory
- cleanup of files in sgf/ directory
- bugfixes in writing of sgf trees to file
- global variable mouse removed, together with option --nomouse
- patterns/patterns.c split into patterns/patterns.c and
  patterns/josekidb.c so that the latter file contains the joseki database
  files derived from the joseki sgf files
- bugfix in mouse_defendpats.db
- one new game record regression/games/reading04.sgf
- one new test case in reading.tst