Collect static on provisioning, and add better Windows support.

 - Requires that the user have SeCreateSymbolicLinkPrivilege priveleges
   or run vagrant as an administrator.
   See http://superuser.com/questions/124679/how-do-i-create-a-link-in-windows-7-home-premium-as-a-regular-user
   and http://kmile.nl/post/73956428426/npm-vagrant-and-symlinks-on-windows
   for more information