Adds the shell of lib/.
Adds a utility module for rendering ERB templates in their own context.

This serves two purposes, to extract the ERB usage and to keep what's passed
to the template clean. This should clarify what's being passed to be rendered
in future.
Extracts the box building functionality into Boxes::Builder.
Adds a default argument to builder for the output name.
Adds a script to setup chruby, ruby-install and rubies 1.9.3, 2.0.0 and 2.1.2.
Adds a 'special box' type that provides a ruby environment.
Reverts to the old method of configuring password-less sudo.

It's possible that this is now broken on lucid. But it was broken everywhere
else before.