Adding more details to steps for ImageNet App in Readme

[robertnishihara]

Looks good! To make it a little simpler, can you replace steps 2 and 3 with a single step that says something like "Put the training and test data on S3 (see instructions in this issue)." And then renumber the subsequent steps appropriately.

[rahulbhalerao001]

Ok, I have simplified the instructions and renumbered the subsequent steps.

[robertnishihara]

Looks excellent! Can you squash those commits together, and then I'll merge it! http://stackoverflow.com/questions/5189560/squash-my-last-x-commits-together-using-git

[rahulbhalerao001]

I have squashed the commits together. Thank you for the link with the information.

[robertnishihara]

Thanks a lot!

[robertnishihara]

Addresses #59.