Merge pull request #876 from Unity-Technologies/release-windows-save-model-fix

some hack to make windows save the model when do ctrl+c

python/unitytrainers/trainer_controller.py

                 if global_step != 0 and self.train_model:
                     self._save_model(sess, steps=global_step, saver=saver)
             except KeyboardInterrupt:
+                print('--------------------------Now saving model-------------------------')
                 if self.train_model:
                     self.logger.info("Learning was interrupted. Please wait while the graph is generated.")
                     self._save_model(sess, steps=global_step, saver=saver)