Mismatch of displayed 'epoch'
🐛 Bug
The display of epoch's number mismatches between the progress bar and the checkpoint indicator. I wonder this mismatch could confuse users.

progress bar: The number of epochs starts from 1.
checkpoint indicator: The number of epochs starts from 0.
metrics.csv also starts from 0.

I think that to change checkpoint and metrics.csv causes a serious problem.
So progress bar should be changed in my opinion.
What do you think about it?
Epoch 32: 100%|██████████| 331/331 [00:05<00:00, 88.73batch/s, batch_idx=17, loss=1.148, train_batch_loss=1.02, v_num=0, val_loss=1.05]
AINFO:root:
Epoch 00031: val_loss reached 1.04545 (best 1.04545), saving model to /dummy/version_0/checkpoints/_ckpt_epoch_31.ckpt as top 1
{'loss': 1.022357702255249, 'train_batch_loss': 1.022357702255249, 'val_loss': 1.0454469919204712}
Epoch 33:   5%|▌         | 18/331 [00:00<00:05, 61.06batch/s, batch_idx=17, loss=1.073, train_batch_loss=1.31, v_num=0, val_loss=1.05]

Environment

PyTorch Version : 1.3.1
OS : macOS 10.14.6
How you installed PyTorch : pip install git+https://github.com/williamFalcon/pytorch-lightning.git@master --upgrade
Python version : 3.7.3
use CPU