Switched oauth from a browser-based flow to a command line flow.

Small change to switch oauth from a browser-based flow to a command line flow.

Very nice spark examples against the Reads API!  I especially liked the example comparing tumor to normal reads from the synthetic data for the [DREAM SMC challenge](https://www.synapse.org/#!Synapse:syn312572/wiki/).  Had no trouble running them end to end on a Google Compute Engine instance.  Have not yet tried them in a Spark cluster scenario.