Update README.md

adding link to digits repo

Author: kmader

README.md

@@ -1,5 +1,5 @@
 # Digits Docker in Binder using a Dockerfile
-A simple repository to get NVIDIA DIGITS running inside of Binder for easier experimentation and exploration. 
+A simple repository to get [NVIDIA DIGITS](https://github.com/NVIDIA/DIGITS) running inside of Binder for easier experimentation and exploration. 
 
 [![Binder](http://mybinder.org/badge.svg)](http://mybinder.org/v2/gh/4Quant/digits-docker-binder/master?urlpath=digits)