Include all the cookbooks we want available
Do not download cookbooks directly to nodes on bootstrap
Use `:nodes` over `:boxes` as `:boxes` is deprecated
Add base struct support to `Vagabondfile`
Sync local cookbooks to node on bootstrap
Minor fixes around spec vs. spec start

Docs were incorrectly calling vagabond spec my_cluster
instead of vagabond spec start my_cluster. Also added
the necessary --irl CLI flag when executing against a
running production cluster to keep vagabond from destroying
the nodes at run-end. :)