Code for GKD

The loss.py has been uploaded and it's recommended to replace the vanilla loss function by GKD loss. Tface

We also provide a concise training code for a quick start. Replace the dataset definition with yours, an optimal definition of dataset is insightface

The code for testing on MegaFace is based on Insightface. Also, I have uploaded the code to obtain the testing results tpr@far=1e-x named tpr.py.