add QuantLib and Finance section

Author: christiankolding

README.md

@@ -15,6 +15,7 @@ A curated list of awesome C/C++ frameworks, libraries, resources, and shiny thin
 	- [Cryptography](#cryptography)
 	- [Database](#database)
 	- [Debug](#debug)
+	- [Finance](#finance)
 	- [Game Engine](#game-engine)
 	- [GUI](#gui)
 	- [Graphics](#graphics)
@@ -222,6 +223,9 @@ A curated list of awesome C/C++ frameworks, libraries, resources, and shiny thin
 * [Remotery](https://github.com/Celtoys/Remotery) - Single C File Profiler with Web Viewer. [Apache2]
 * [UnitTest++](http://unittest-cpp.sourceforge.net/) - A lightweight unit testing framework for C++. [MIT/X Consortium license]
 
+## Finance
+* [QuantLib](http://quantlib.org/index.shtml) - A free/open-source library for quantitative finance [BSD]
+
 ## Game Engine
 
 * [Allegro](http://alleg.sourceforge.net) - A cross-platform library mainly aimed for video games and multimedia programming. [zlib]