add jquery

Signed-off-by: duxiaofeng-github <297951292@qq.com>
delete js

Signed-off-by: duxiaofeng-github <297951292@qq.com>
modify gitignore

Signed-off-by: duxiaofeng-github <297951292@qq.com>
waterfall.coffee done

Signed-off-by: duxiaofeng-github <297951292@qq.com>