Unlock appbundler version, bump to 0.4.0 via omnibus-sw

* omnibus-sw ab19f5dedbbd10f29da3ec6087dd3dd9e94545b4 bumps appbundler
  to 0.4.0
* Remote version override for appbundler in ChefDK project defn.

See also: https://github.com/opscode/omnibus-software/pull/344

@opscode/client-engineers @opscode/release-engineers