Organize hyperparameter sweeps

[ngrayluna]

Condensed content, removed emojis, fixed markdown titles sizes, etc.

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The following colabs were changed -colabs/pytorch/Organizing_Hyperparameter_Sweeps_in_PyTorch_with_W&B.ipynb

[tcapelle]

Can I merge this?

[ngrayluna]

@tcapelle Yes, please. :)

Oh, do we need to clear out this line (kernel spec info): https://github.com/wandb/examples/pull/517/files#diff-df362cc8062e3f79092e816d7a26ebc58d35a950ddbbda11ab608c2bf3162fb7R585