pip install ".[dev, examples] in CONTRIBUTING.md

[daniellepintz]

In CONTRIBUTING.md we say to install the following:

python -m pip install ".[dev, examples]"
python -m pip install pre-commit

What do dev and examples refer to?

[ananthsub]

https://github.com/PyTorchLightning/pytorch-lightning/tree/master/requirements

I'm not sure why we have devel instead of dev though. @Borda do you know?

[daniellepintz]

Thanks!

[Borda]

no special reason, just sound cooler :D

[daniellepintz]

Resolved: https://github.com/PyTorchLightning/pytorch-lightning/blob/5914fb748fb53d826ab337fc2484feab9883a104/setup.py#L39-L49