Add Scientific Linux 6.4 x64 boxes for virtual box

I do not know what the procedure is to get my vbox files into S3, so I've put them on a public web server I manage.  They will be temporarily available at http://vagrant.tamu.edu.

The "nocm" box is currently being used and tested successfully using my [puppet-zfsonlinux](https://github.com/treydock/puppet-zfsonlinux) module.