README.md changes + screenshot

[ondine]

H @asimjalis, thanks so much for the talk and quickstart! I added the solutions that we spoke of to the issues encountered thus far. I've also included a test notebook OK_TestNotebook.ipynb (which is failing) that has the test Scala code from the readme.

sc.parallelize(1 to 100).
  filter(x => x % 2 == 0).
  map(x => x * x).
  take(10)

I've pasted the gist here: https://gist.github.com/ondine/56186677a0414d8bc98b (which has both the command line and UI traces).

Thoughts?

I can also close and resubmit this PR without the failing test notebook if that would be helpful?