Pandas talk

@zonca I made a pull request for you.  Feel free to make your own if you prefer to do it differently.

A couple things you might want to look at before signing off, requesting changes, or submitting a new PR:

* I added a README file and a requirements.txt file
* I noted the implicit all rights reserved copyright.  Feel free to state a license if you prefer to.  I CC0-licensed (basically international public domain) all of my talks so far

I didn't link to the original gist.  We could do that if you plan to possibly iterate that.

I also didn't add any contact information or details about the talk.