Update README.md

Author: codingchili

README.md

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 # chrome-embedded-demo
 Simple demo using the chrome embedded framework with CFE4Delphi to load an SPA as a desktop App.
 
+![preview.png](https://raw.githubusercontent.com/codingchili/chrome-embedded-demo/master/preview.png)
+
 # Building
 1. Install CEF4Delphi: https://www.briskbard.com/index.php?lang=en&pageid=cef
 2. Add library path to /sources.