[enhancemnt] 添加贡献指南 (#282)
[enhancemnt] 添加贡献指南 (#282)

* README: Add contribution guide

Signed-off-by: Ce Gao <4719bad8fcd80cf8a4944f8e20dc80641feb4eca@outlook.com>

* README: Update

Signed-off-by: Ce Gao <4719bad8fcd80cf8a4944f8e20dc80641feb4eca@outlook.com>

weijianwen/SJTUThesis