Update README.md

Adding extra hypervisor packages needed for Virtualisation
Update README.md

Updating virtualisation package list
Update README.md
Update kickstarts/centos6x-hypervisor-gpt-selinux.cfg

Switched /dev/vda to /dev/sda since this kickstart is for the hypervisor which will be bare metal
Change libvirt logvol size to 50% of volume group

Keep 50% of volume group available for snapshots, and future logical volumes
Update kickstarts/centos6x-hypervisor-gpt-selinux.cfg

Adding back size argument
Update kickstarts/centos6x-hypervisor-gpt-selinux.cfg
Added kvm related packages to hypervisor kickstart

kvm
virt-manager 
libvirt 
libvirt-python 
python-virtinst 
virt-top 
libguestfs-tools
Fix to virt-sysprep command

Swapped 'virt-sysprep -a' for 'virt-sysprep -d' in step 4.
Tidied up step 4
Tidied up image filenames
Create centos6x-i386-vm-gpt-selinux.cfg
Nicola: update kickstart configuration and cleanup script
Nicola: add virt-install usage example
Changed default password

Swapped the default password back to the original to save confusion.
Corrected start date.
Update README.md

Replacing more references to CentOS 6.3 with CentOS 6.x
Increased size of root partition from 4GB to 20GB
Update README.md
Nicola: update usage notes