Screenshot in readme

Author: adamsol

README.md

@@ -3,6 +3,8 @@ ThreeStudio
 
 ### 3D game editor based on Three.js and Electron.
 
+![image](img/editor.jpg)
+
 Aim of the project is to create a functional 3D editor using existing open-source web-based frameworks and libraries.
 - Application: Node.js + Electron
 - Core: HTML + CSS + JavaScript + jQuery