Corrected CentOS 6 PV-Grub instructions.
Confirmed instructions for CentOS 7 match 6, edited to reflect.
Resolved formatting and typographical errors.
Grammar Edit.
Formatting edit.
spacing under numbered step fix
Merge pull request #1 from alexfornuto/centospvgrub

spacing under numbered step fix
Merge pull request #55 from thetechstewart/centospvgrub

Corrected CentOS 6 PV-Grub instructions.