update README

README.md

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 # Skelan
-Skeletal animation in a clean and unified structure for easy use
+Skeletal animation in a clean and unified structure for easy use.
+
+Using libraries:
+
++ [assimp](https://github.com/assimp/assimp)
+
++ [glm](https://glm.g-truc.net/0.9.9/index.html)
+
++ [glfw](https://www.glfw.org/)
+
+## Building:
+
+Use [Cmake](https://cmake.org/download/)>3.5 to create lib files.
+
+## How to use:
+
+Include **"GameObject.h"**. Add all file in **include** directory to your project. Link your **lib** file.
+
+## Example:
+
+![Alt Text](https://media.giphy.com/media/SYvUAr66dVr1SHAVAP/giphy.gif)