Update Readme file

README.md

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+## ReactPhysics3D
+
+ReactPhysics3D is an open source C++ physics engine library that can be used in 3D simulations and games.
+
+Website : [http://www.reactphysics3d.com](http://www.reactphysics3d.com)
+
+## Features
+
+ReactPhysics3D has the following features :
+
+- Rigid body dynamics
+- Discrete collision detection
+- Collision shapes (Sphere, Box, Cone, Cylinder, Capsule, Convex Mesh)
+- Multiple collision shapes per body
+- Broadphase collision detection (Dynamic AABB tree)
+- Narrowphase collision detection (GJK/EPA)
+- Collision response and friction (Sequential Impulses Solver)
+- Joints (Ball and Socket, Hinge, Slider, Fixed)
+- Collision filtering with categories
+- Ray casting
+- Sleeping technique for inactive bodies
+- Integrated Profiler
+- Multi-platform (Windows, Linux, Mac OS X)
+- Documentation (User manual and Doxygen API)
+- Examples
+- Unit tests
+
+## License
+
+The ReactPhysics3D library is released under the open-source [ZLib license](http://opensource.org/licenses/zlib).
+
+## Documentation
+
+You can find the User Manual and the Doxygen API Documentation [here](http://www.reactphysics3d.com/documentation.html)
+
+## Issues
+
+If you find any issue with the library, you can report it on the issue tracker [here](https://github.com/DanielChappuis/reactphysics3d/issues).

README.txt

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-ReactPhysics3D is an open source C++ physics engine library that can be used in 3D simulations and games. The library is released under the ZLib license.
-
-ReactPhysics3D has the following features :
-
-- Rigid body dynamics
-- Discrete collision detection
-- Collision shapes (Sphere, Box, Cone, Cylinder, Capsule, Convex Mesh)
-- Broadphase collision detection (Sweep and Prune using AABBs)
-- Narrowphase collision detection (GJK/EPA)
-- Collision response and friction (Sequential Impulses Solver)
-- Joints (Ball and Socket, Hinge, Slider, Fixed)
-- Sleeping technique for inactive bodies
-- Integrated Profiler
-- Multi-platform (Windows, Linux, Mac OS X)
-- Documentation (User manual and Doxygen API)
-- Examples
-- Unit tests
-
-Website : https://code.google.com/p/reactphysics3d/
-Author  : Daniel Chappuis