Reusable, Repeatable CloudFormation with Cog

Here's a direct link to a short (6m) screencast by @imbriaco walking through the basics. https://www.youtube.com/watch?v=bYb-Z52oCT0

We'll be continuing to work on the cfn bundle and release new screencasts on more complex workflows over the next few weeks. So, let us know if there's anything particularly frustrating about your current CloudFormation workflow.