Add linode.gpg key
Template for apt source file in /etc/apt/sources.list.d/
Add longview and longview::dependencies classes
Add development dependencies
Add Rakefile for rspec-puppet

See http://rspec-puppet.com/setup/
Add default owner and group for File resources
Notify longview service when package is installed
Add pry and puppet gems as development dependencies
Add spec setup according to http://rspec-puppet.com/tutorial/

And the specs for the `longview` and `longview::dependencies` classes.