This is the refactor of security group creation that I was threatening. It works well and has specs, but the behavior with VPCs and security groups seems (to me) to be exactly as ambiguous as before.
Added support for "prepare" phase, prior to any machine-specific actions
(fix #189) Move security group creation and authorization assurance t…
…o prepare phase
Move keypair creation to prepare phase
(fix #207) Allow user/group-style security group references
👍 Multi-node launches look much cleaner (and are almost certainly more polite to the underlying APIs). Thanks!