Update README, add screenshot

Author: tobiasvl

README.md

@@ -3,6 +3,10 @@ Daterad Rekreationell Övnings-Mikrodator
 
 DRÖM ("DREAM" in Swedish) is an emulator for the CHIP-8-based DREAM 6800 home computer, powered by [LÖVE](https://love2d.org) and [Moon6800](https://github.com/tobiasvl/moon6800).
 
+You can read about the development of DRÖM in [these blog posts](https://tobiasvl.github.io/tags/#dream-6800), and about the DREAM's history on the official [DREAM 6800 Archive Site](http://www.mjbauer.biz/DREAM6800.htm).
+
+![Screenshot of CHIPOS in DRÖM](screenshot.png)
+
 Features
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