Added vim and boxes to gitignore.
Renamed vagrant.pub -> authorized_keys

* When we install the vagrant public key we'll just replace the
  authorized_keys file since ansible handles that much better.
Renamed packer configuration.

* I'm splitting up the base maching creation and provisioning
Finished centos6_64 packer configuration.

* Guest additions is properly installed (which is what was taking some
  time to figure out).
Added .ova files to gitignore