增加新记录
增加docco生成文档；简化代码；转用erb
在生成html自动运行deploy
增加Rakefile
deploy.rb集成到了Rakefile中
update README
把计时函数移到rakefile中了
minor change
增加rake preview
update rake: add :doc task
ignore folder starts with _
另一种方法实现了功能；oop加lambda
do not need variable context
back to using erubis, since it\'s much faster than erb; 0.3s vs 1.3s
make it shorter
done oop
better doc
better doc
ready to merge