added crown in Game Engine section

fffaraz#948

Author: alexgomes09

README.md

@@ -405,6 +405,7 @@ A curated list of awesome C++ (or C) frameworks, libraries, resources, and shiny
 * [Atomic Game Engine](https://github.com/AtomicGameEngine/AtomicGameEngine) - A multi-platform 2D and 3D engine with a consistent API in C++, C#, JavaScript, and TypeScript. [Commercial]
 * [Cocos2d-x](http://www.cocos2d-x.org/) - A multi-platform framework for building 2d games, interactive books, demos and other graphical applications. [MIT]
 * [Corange](https://github.com/orangeduck/Corange) - A game engine written in pure C, SDL and OpenGL. [BSD]
+* [crown](https://github.com/dbartolini/crown) - Crown is a general purpose data-driven game engine, written from scratch in orthodox C++ with a minimalistic and data-oriented design philosophy in mind. [MIT]
 * [delta3d](http://sourceforge.net/projects/delta3d/) - A robust simulation platform. [LGPL2]
 * [EnTT](https://github.com/skypjack/entt) - Gaming meets modern C++. [MIT]
 * [GamePlay](https://github.com/gameplay3d/GamePlay) - A cross-platform native C++ game framework for creating 2D/3D mobile and desktop games. [Apache2]