add Segment, Board.
more work on Board, Snake.
fix render
back end works
rewrite using underscore
formatting
formatting
Delete snake.js
implement collision logic.
merge
finish snake.
Create README.doc
Rename README.doc to README.rdoc
add colors.
make apples green.
Merge branch 'master' of https://github.com/yangmillstheory/snake
add walls.
more walls!
update README
DRY up snake.css