Markdown 甘特图

甘特图：

gantt
    title A Gantt Diagram

    section Section
    A task           :a1, 2014-01-01, 30d
    Another task     :after a1  , 20d
    section Another
    Task in sec      :2014-01-12  , 12d
    anther task      : 24d

参考：

https://github.com/adrai/flowchart.js https://github.com/mermaid-js/mermaid