add readme

Windows/SoftCertPolicyAppender/README.md

+## 使用方法 ##
+SoftCertPolicyAppender.exe <证书路径>
+SoftCertPolicyAppender.exe <证书路径> <证书路径2> ...
+
+## 备注 ##
+- 需要管理员权限 
+- 需要[.net framework 4.0](http://www.microsoft.com/en-us/download/details.aspx?id=17718)
+
+
+## 引用组件 ##
+[local-policy](https://bitbucket.org/MartinEden/local-policy/overview)
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