text: Title: latest_net_<D/G>_<A/B> vs  <epoch_count>+<save_latest_freq> Net
  Body: I am confused by the checkpoints `latest_net_D_A`, `latest_net_D_B`, `latest_net_G_A`, and `latest_net_G_B`.
  We save checkpoints every `--save_epoch_freq`. So I would guess that if I trained my network for 10 Epochs with, `--save_epoch_freq` set to 5,  `10_net_D_B.pth` will be equal to `latest_net_D_B.pth`.
  However, what if I train my network for 10 Epochs with, `--save_epoch_freq` set to 5, but the training gets interrupted at epoch 8, is `latest_net_D_B.pth` then equal to `5_net_D_B.pth`, `7_net_D_B.pth`, or `8_net_D_B.pth`?
  If it's the former (equal to `5_net_D_B.pth`), why do we save `latest_net_D_B.pth` at all since it is a duplicate?