Annotated Vagrantfile

For people who dont do ruby, ever, except for using vagrant, looking into the internals can make your head spin.   Heres a bare minimum starter with some comments that help me remember wth ruby is actually doing.  Sometimes i forget that the method calls dont have parenthesis, and that its normal to pass around objects and modify them promisuously in ruby land. 

Over time I'd like to actually trace out the entire code path, from "vagrant up" to the actual creation of a VM...  I'll update this thread with more screenshots over time.