使用说明
可以在https://www.plantuml.com/plantuml/uml中进行调试，然后再draw.io中进行画图导出。
语法说明
@startgantt
'项目开始时间'
Project starts the 2017/01/01
'关闭语法'
saturday are closed
sunday are closed
2018/05/01 is closed
2018/04/17 to 2018/04/19 is closed
'持续时间'
[Prototype design] as [pd] lasts 15 days
'从pd的结束开始'
[Prototype completed] as [pc] happens at [pd]'s end
[Test prototype] as [tp] lasts 10 days
[tp] on {Alice:100%} starts at [pd]'s end
'阶段二'
-- Phase Two --
'从某个日期开始'
[Write] as [wt] starts 2017/01/05
'持续时间'
[wt] requires 5 days
then [Test] as [t] lasts 10 days
'颜色'
[pd] is colored in GreenYellow
@endgantt效果
