Add bootstrap:puppetlabs:debian and don't attempt to install hiera outside of puppetlabs namespace as puppet itself is too old (2.x) in most distro stable repositories.
Document debian bootstrap tasks as well as puppetlabs bootstrapping namespace tha grabs packages via puppetlabs apt-repos.
Document hiera support.
Merge pull request #57 from cosgroveb/master

Make sure hiera is only installed when grabbing puppet via puppetlabs apt repositories and update README to better document bootstrapping tasks.