Remove rubocop

I have enabled HoundCI, which will comment inline on Pull Requests. Let's try
this out.
Fix Travis notifications
Update to latest Berks and TK; Lock to sane Rubocop
[WIP] add windows_chef_zero TK provisioner

This will be point at the released version once Sean merges the change:

  https://github.com/portertech/windows_chef_zero/pull/2
Add Windows 7 and 8.1 to `.kitchen.yml` platforms
Add Windows support to `_user` recipe
Add Windows support to `_git` recipe
Add Windows support to `_packaging` recipe
Create Windows provider for the `ruby_install` resource
Add Windows support to the `ruby_gem` resource
Add cross-platform support to `_ruby` recipe
Ensure Unix-y recipes are no-op on Windows
Perform user creation early in config process

We'll also move all .dotfile creation into the associated recipes.
Only include Chef Sugar in public recipes