temporary software update script

Until we figure out rolling upgrades I needed some way to install.  Doing so completely via an ansible command proved really hard given all the environmental state we needed (virtenv, paths, etc) so this script does that for me.

Currently hardcodes the stanford branch. 

I know this is terrible.  I look forward to the day when we can update software a nicer way.  Can someone get onto master in the interim though?