Update dependencies
Add Vagrant's require_plugin to README example
Add note about not checking if required dependencies are installed
Change vagrant box provisioning to use 2 cpus
Caches gem tarballs on dev boxes
Eager loads plugin files in case we need to verify constant names on specs
Prevent `exec` and `fork` on unit specs
Update LXC::Action TODOs
Install puppet 3.1.1 on base quantal64 box
Installs chef on base quantal64 box

Closes #37
Install man-db and psmisc on base quantal64 box
Clean up quantal64 rootfs after building box
Remove note about chef not being supported on quantal64 box
Update base quantal64 box references