Package the gdk library

Signed-off-by: John Else <john.else@citrix.com>
Add a specfile for gpumon

Signed-off-by: John Else <john.else@citrix.com>
Run gpumon tests

Signed-off-by: John Else <john.else@citrix.com>
Update the README

Signed-off-by: John Else <john.else@citrix.com>
Merge pull request #7 from johnelse/add-gpumon

Add specfiles for the NVIDIA GDK and gpumon
CP-9977 - Switch to Xen's ocaml libraries for xenctrl and xenlight
Merge pull request #8 from andyhhp/master

CP-9977 - Switch to Xen's ocaml libraries for xenctrl and xenlight