Added GAN tutorial.

Updated images/thumb_mushroom_biggan.gif

Updated tutorial_gans/tutorial_gans.ipynb

Updated tutorial_gans/tutorial_gans.ipynb

Updated tutorial_gans/tutorial_gans.ipynb

Merge branch 'master' of https://github.com/lexfridman/mit-deep-learning

adding gan tutorial

fix colab issue

Update network for MNIST example

Update network for MNIST example

Update deep_learning_basics.ipynb

Updates addressing issue 11

Update README.md

Merge pull request #9 from siddiqaa/patch-1

Update README.md