begin minesweeper work
minesweeper.rb: inspect shouldn't be so verbose
minesweeper.rb: flesh out Tile
minesweeper.rb: flesh out Board
minesweeper.rb: begin writing MinesweeperGame
minesweeper.rb: more work
minesweeper.rb: minor tweaks
minesweeper.rb: move lose logic to board
minesweeper.rb: add more rendering logic
minesweeper.rb: implement saving/loading
Rakefile: comment out -I option
Merge branch 'minesweeper'