Tutorial post on system configuration

A bash script to get CentOS 6 machines up and running with system
packages needed for Harvest and code contribution, including python 2.7

I walked two people through various stages of system configuration
BEFORE installing harvest and starting a project, so I thought I'd combine
that experience with puppet scripts by @tjrivera and @wraziens into a
simple bash script users who aren't into puppet, vagrant, etc can run just
to get started. This is what I came up with.