Merge branch 'master' into branch-2.1.0

README.md

@@ -89,6 +89,13 @@
 * [资源配置指南](./docs/deploy/resource_config_guide.md)
 * [使用OpenBlas给算法加速](./docs/deploy/blas_for_densematrix.md)
 
+## Community
+* Mailing list: [email protected]
+* Angel homepage in Linux FD: https://lists.deeplearningfoundation.org/g/angel-main
+* [TSC members & Committers](./Community.md)
+* [Contributing to Angel](./CONTRIBUTING.md)
+* [Roadmap](https://github.com/Angel-ML/angel/wiki/Roadmap)
+
 ## FAQ
 * [工程类问题](https://github.com/Tencent/angel/wiki/%E5%B7%A5%E7%A8%8B%E5%B8%B8%E8%A7%81%E9%97%AE%E9%A2%98)
 * [算法类问题](https://github.com/Tencent/angel/wiki/%E7%AE%97%E6%B3%95%E5%B8%B8%E8%A7%81%E9%97%AE%E9%A2%98)