standardize dataset naming conventions

[kirk86]

Please standardize at least the naming convention for all datasets when using DataLoader so that data are in loader.dataset.data and labels in loader.dataset.targets.
MWE:

loader_cifar = torch.utils.DataLoader("CIFAR10")
loader_cifar.dataset.data <-- contains the data
loader_cifar.dataset.targets <-- contains targets

loader_svhn = torch.utils.DataLoader("SVHN")
loader_svhn.dataset.data <-- contains the data
loader_svhn.dataset.labels <-- contains targets

This can be really confusing and error prone when developing code to run on multiple datasets.

cc @pmeier

[pmeier]

See #1080.

[kirk86]

Thanks, where are we with that? Any progress?
I've already added my two cents on that issue as well.