Add "Up and Running" deck

Closes https://github.com/github/teach.github.com/issues/223.  Note that the chapter order is a bit different from that of Foundations, which I think works better with the workflow-based approach I've been going for in these sessions – see commit msg of https://github.com/github/training.github.com/commit/890560c0dbf7578eeecddd5355035c71eaed2cc7.  Thanks for the tip of using tags to achieve this @jordanmccullough!

/cc @ChrisLundquist @jglovier @matthewmccullough