Update CentOS 6.4 box.

CentOS 6.4 x86_64 Minimal (2013-12-18)

Highlights of this release:

  * New NATNET variable for when VirtualBox's default NAT network
    doesn't suit your needs.
  * Added a failover clock.
  * Network interfaces aren't tied to particular hardware address.
  * Variables are now defined in `vars.sh`.
  * Use of `releasever` with `yum` should fix builds to intended
    version.

  * SSH keys are now generated on first boot.
  * IPv6 is now enabled.
  * Results of the build can be emailed to you. See notes in README.
  * Remove some extra packages that "Development Tools" throws in
    there. See the packages diff for full information.
  * The yum cache now ships empty.
  * yum-utils is now maintained in the build. It is a collection of
    useful tools to get more information about your local packages.
  * Many of the logs in /var/log are cleared to not confuse with
    your debugging.
Update CentOS 6.5 box.

CentOS 6.5 x86_64 Minimal (2013-12-19)

Highlights of this release:

  * New NATNET variable for when VirtualBox's default NAT network
    doesn't suit your needs.
  * Added a failover clock.
  * Network interfaces aren't tied to particular hardware address.
  * Variables are now defined in `vars.sh`.
  * Use of `releasever` with `yum` should fix builds to intended
    version.
Update CentOS 6.4 box.

CentOS 6.4 x86_64 Minimal (2014-01-16)

Highlights of this release:

  * Fix for swap drive not being automatically mounted.
  * Put the swap drive on a separate disk.
  * Lock the kernel version a different way so plugins like
    `vagrant-vbguest` can upgrade VirtualBox Guest Additions.
  * Improved shell script cross compatibility.
  * Reduced the size of the initramfs.
  * The final cleanup operation performed before distribution should
    now be faster.
Update CentOS 6.5 box.

CentOS 6.5 x86_64 Minimal (2014-01-16)

Highlights of this release:

  * Fix for swap drive not being automatically mounted.
  * Put the swap drive on a separate disk.
  * Lock the kernel version a different way so plugins like
    `vagrant-vbguest` can upgrade VirtualBox Guest Additions.
  * Improved shell script cross compatibility.
  * Reduced the size of the initramfs.
  * The final cleanup operation performed before distribution should
    now be faster.
Merge pull request #243 from casr/2creatives-centos-20131218

Update CentOS 6.4/6.5 boxes