missing classmethod decorator on from_pretrained methods

[FlorianMF]

🐛 Bug

The method from_pretrained in at least AE (basic_ae_module.py) and VAE (basic_vae_module.py) should be a classmethod to instantiate an object using this method.
Momentarily calling this method returns TypeError: from_pretrained() missing 1 required positional argument: 'checkpoint_name'.

Environment

• Bolts: 0.3.0

[FlorianMF]

In the fixed issue #224 the model has first to be instantiated and than the method called.
The docstrings though state the following :

    Example::

        # not pretrained
        ae = AE()

        # pretrained on cifar10
        ae = AE.from_pretrained('cifar10-resnet18')

[akihironitta]

@FlorianMF Thank you for reporting the issue. We recently fixed the docs in #557, so could you have a look at the latest docs?
https://pytorch-lightning-bolts.readthedocs.io/en/latest/autoencoders.html

related: #200

Feel free to reopen this issue if there's still any problem.