modified .gitignore to ignore vi swap files
added README for black knots
Merge commit '050e1a55dc9948991f495544fcdb5b8c3d0e8d6c'
Merge branch 'bk_ideas' of brian.minton.name:src/icfp/icfp2006 into bk_ideas
I don't remember who made this file.  I think it might have been Jessica by hand.
removed descriptive output on run_bb.sh so output matches spec format
Merge branch 'bk_ideas' of github.com:bjmgeek/icfp2006 into bk_ideas
added 020.knot based on old version of move code.  About half the destinations are right, needs plinks
manually working on 020; all inputs go to right outputs, but some need plinks, and some have too many plinks