Add javascript demo link to readme

Author: Elucidation

readme.md

@@ -3,6 +3,7 @@ TensorFlow Chessbot - [/u/ChessFenBot](https://www.reddit.com/user/ChessFenBot)
 
 *CLI and Bot code lives on the [chessfenbot branch](https://github.com/Elucidation/tensorflow_chessbot/tree/chessfenbot)*
 
+[Live demo here](http://tetration.xyz/ChessboardFenTensorflowJs/) using [TensorflowJs](https://js.tensorflow.org/)
 
 **TL;DR**: 
 > Turn http://i.imgur.com/HnWYt8A.png → [1nkr4/1p3q1p/pP4pn/P1r5/3N1p2/2b2B1P/5PPB/2RQ1RK1](https://lichess.org/analysis/1nkr4/1p3q1p/pP4pn/P1r5/3N1p2/2b2B1P/5PPB/2RQ1RK1_w)