Clarify OS X support
Add compatibility for Bash 3.x

The `|&` is new in Bash 4, which is not the default on Macs.

Given that Laptop is meant to be run on a fresh machine, `2>&1 |` is preferable,
since it'll work on the Bash 3.x, which is what comes installed on new machines.
Repackage base boxes, used by rspec tests
Remove support for EOL'd ubuntu-13.10 (saucy)

Saucy reached its EOL on 7/17/14.

https://lists.ubuntu.com/archives/ubuntu-announce/2014-June/000185.html