cleaned up and strongly improved interpreter, TODO fix winning
condition, program seems to think that connecting the middle field with
one edge means victory immediately
fixed handling of fork and bridge, still TODO fixing ring condition
ring detection works, its still difficult to predict wether to make a
turn for own good or to block the opponent
added some hgf-files for testing
experiments with evaluation of white and black
worked on prediction
experimental: changed ring condition handling
experimental: changed ring condition handling
fixed ring handling, strongly improved evaluation concerning the choice
between own turn or blocking opponent
improved victory detection, renamed all bdds to match semantics