Security system repo set for use with recipe

I modified this repo so that anyone going through the [IoT Security System Recipe](http://www.zettajs.org/recipes/2014/09/18/IoT-Security-System.html) can follow along by moving their history to tags that look like `step-0`, `step-1`, etc. 

I removed most of the security system documentation in favor of referencing the recipe. 

I removed all the extra branches that were in the repo.