Start ChefSpec coverage the right way
Prefix platform recipes with underscores

This helps clarify what is a top-level recipe, and what is only meant
to be included internally.
Give a nicer warning message when a platform is not found
Timing is a library, not a recipe
Use a library for installing XCode Command Line Tools
Add OSX 10.9 to the testing matrix

Regular users will not be able to test the OSX box, but that is okay.
Add FreeBSD to list of platforms