rename uniq.rb --> my_uniq.rb
working on word chains.
try word_chains with treenode.
node direction i took is an absolute disaster.
First commit
node modeling attempt.
initialize game board
plant numbers
show board
working view.
add neighbors
bfs_sweep draft
Added breadth-first search
refactor set_bombs
word chains failboat.
Add 'w2d1/' from commit '4eeddb40690960f83fac9c976f4209e1541a3fb9'

git-subtree-dir: w2d1
git-subtree-mainline: af780ff5b73877e7615a8dde2281ece1258cb68c
git-subtree-split: 4eeddb40690960f83fac9c976f4209e1541a3fb9
add w2d1 material, including assessment and solutions