Adapt CentOS-6.2-x86_64-netboot template for 6.3.
Merge pull request #460 from lotia/centos-6.3-netboot-template

Adapt CentOS-6.2-x86_64-netboot template for 6.3.
Merge pull request #458 from vdemeester/master

Quick update on kvm doc - Bump fog version to 1.8 
added dkms to allow virtualbox dkms module to be created during virtualbox installation time
fix mixed options from symbols to strings for tests