Suggest: Improve Tensorflow documentation

[jayant-yadav]

Your suggestion

Add Pytorch documentation too inside Tensorflow doc and change its name. OR create a separate doc for pytorch which, for now seems un necessary.

Also, add how to get 1 GPU with less cores, instead of booking the whole node.
interactive -A <proj> -p core -n 1 -C GPU --gpus-per-node=1 -t 01:00:00