Refactor for Berkshelf

Lots happening here:

* The cookbook now can be used w/ Berkshelf
* Structure follows current, accepted convention for a cookbook
* README cleaned up:
    * Includes all attributes
    * Follows pattern set down by Berkshelf
    * More explicit
    * Example data bags are inline, instead of separate files
* Bumped version number to 2.0.0 reflect major, breaking changes
* Removed `Cakefile`, as GitHub's "releases" mechanism can be used to
create the necessary archive to upload to Opscode Community
    * This removes the need to install Node.js & CoffeeScript

This cookbook converges using Vagrant, though there are some caveats:

* Must specify the path to your data bags in the Vagrantfile
    * This isn't a change that could be considered generic enough to
    accommodate everyone's setup, thus it has been omitted.
* A data bag following the example in the README must exist