Tidy up README and TOC (#1108)
Tidy up README and TOC (#1108)

Bring the TOC in line with recent additions and enable the ability to
use a vim plugin to quickly regenerate in lieu of a better alternative.

Using https://github.com/mzlogin/vim-markdown-toc

Clean up any trailing whitespace so that subsequent file updates
by other PRs will be able to simply regen using appropriate tooling
without pulling in additional changes unrelated.
electrofelix/vagrant-libvirt,electrofelix/vagrant-libvirt,pradels/vagrant-libvirt,pradels/vagrant-libvirt,vagrant-libvirt/vagrant-libvirt,vagrant-libvirt/vagrant-libvirt,vagrant-libvirt/vagrant-libvirt,electrofelix/vagrant-libvirt