logging module collision

[hadim]

Logging module collides with the Python one:

import pytorch_lightning as pl
dir(pl.logging)

It gives you the python logging module attributes instead of the pytorch_lightning ones.

This is probably due to this https://github.com/PyTorchLightning/pytorch-lightning/blob/deffbaba7ffb16ff57b56fe65f62df761f25fbd6/pytorch_lightning/__init__.py#L31

Maybe you should rename the logging module to something else such as logger?

[hadim]

duplicate #731