About cosinface_loss in the face_losses.py

[HsuTzuJen]

@auroua Is this implement with Cos θ - m (Additive Margin Softmax for Face Verification)? Do you have any idea about that how to achieve cos θ1 -m = cos θ2 (CosFace: Large Margin Cosine Loss for Deep Face Recognition)

[auroua]

The function cosineface_losses in face_losses.py is implementation of CosFace: Large Margin Cosine Loss for Deep Face Recognition.