Reconciles broken `bin/xkb` map with good version

Apparently, I'd created a `bin/xkb` directory when first trying to
combine the `bin` and `xkb` repos.  Update the `xkb` version of the
`benizi` keymap with changes from the `bin` version, and remove the
`bin` version.
Installs Vundle if not present
s/Bundle/Plugin/ for vundle whim

Testing my patience, Vundle... No reason for that to change.
Gitignores Vim Vundle checkout