added example gif to readme

Author: Almenon

README.md

@@ -1,3 +1,16 @@
-a VScode extension for AREPL
+## AREPL: now a vscode edition
 
-automatically evaluates python code in real-time as you type
+AREPL automatically evaluates python code in real-time as you type
+
+Contact me to get the beta release!
+
+![Alt Text](https://raw.githubusercontent.com/Almenon/AREPL-vscode/master/example.gif)
+
+#### Deveveloper Setup:
+
+1. Install python 3 and npm (if not already installed)
+2. clone this repository
+3. npm install
+4. start debugging
+
+see [AREPL-backend](https://github.com/Almenon/AREPL-backend) for the npm package that executes the python code