Added Oracle Linux 5.9 Based Box and Updated 6.3 to 6.4

Hi Gareth,

I have updated the Oracle Linux 6.3 base box to 6.4, in addition optimizations and clean-ups have been done, details here => [oracle64](https://github.com/terrywang/vagrant/blob/master/oracle64.md).

An Oracle Linux 5.9 base box built from scratch has been added, details here => [oracle59](https://github.com/terrywang/vagrant/blob/master/oracle59.md).

Cheers,
Terry