Add Workflow to Frameworks.

Workflow, C++ Parallel Computing and Asynchronous Networking Engine.

Author: holmes1412

README.md

@@ -111,6 +111,7 @@ A curated list of awesome C++ (or C) frameworks, libraries, resources, and shiny
 * [Ultimate++](http://www.ultimatepp.org/) - A C++ cross-platform rapid application development framework. [BSD]
 * [uSTL](http://msharov.github.io/ustl/) - The small STL library. [MIT]
 * [Windows Template Library](http://sourceforge.net/projects/wtl/) - A C++ library for developing Windows applications and UI components. [Public]
+* [Workflow](https://github.com/sogou/workflow) - C++ Parallel Computing and Asynchronous Networking Engine. [Apache2]
 * [Yomm2](https://github.com/jll63/yomm2) - Fast, Orthogonal, Open multi-methods. Supersedes [Yomm11](https://github.com/jll63/yomm11) [Boost]
 
 ## Artificial Intelligence