updated README.md with a preview image

README.md

@@ -3,4 +3,7 @@ A simple no-frills ACTWebSocket overlay for showing skills, designed as a Proof-
 
 ## Installation
 Make sure the 'Using BeforeLogLineRead' box is checked in ACTWebSocket then click the 'Add URL' button to add this URL:
-`https://rawrington.github.io/SkillDisplay/`
+`https://rawrington.github.io/SkillDisplay/`
+
+##Preview
+![preview.png](./images/preview.png)