Add TreeFrog Framework to Web Application Framework

Author: jgsogo

README.md

@@ -506,6 +506,7 @@ A curated list of awesome C/C++ frameworks, libraries, resources, and shiny thin
 * [Kore](https://kore.io/) - ultra fast and flexible web server / framework for web applications developed in C. [ISC]
 * [libOnion](http://www.coralbits.com/libonion/) - lightweight library to help you create webservers in C programming language. [LGPLv3]
 * [QDjango](https://github.com/jlaine/qdjango/) - A web framework written in C++ and built on top of the Qt library. Where possible it tries to follow django's API, hence its name. [LGPL]
+* [TreeFrog Framework](https://github.com/treefrogframework/treefrog-framework) - High-speed and full-stack web application framework based on C++ and Qt, which supports HTTP and WebSocket protocol (with O/R mapping). [BSD] [website](http://www.treefrogframework.org/)
 * [Wt](http://www.webtoolkit.eu/wt) - A C++ library for developing web applications. [GPL/Commercial]
 
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