Add note about included model

Author: anishathalye

thermometer/README.md

@@ -6,6 +6,10 @@ Paper: [Buckman et al. 2018](https://openreview.net/forum?id=S18Su--CW)
 
 Run `./setup.sh` to fetch models.
 
+The included model is the thermometer-encoded model trained with adversarial
+training, which has 30% accuracy under the specified linf perturbation bound of
+0.031 (while the model trained without adversarial training has 0% accuracy).
+
 ## Breaks
 
 * Thermometer Encoding: BPDA