Merge pull request #64 from djs55/master

add xapi.spec
Make netdev build
Build libvhd
Make tapctl build
Merge pull request #65 from djs55/make-srpms

Make srpms
nbd: nbd-devel doesn't need to depend on nbd (since it doesn't exist)
xapi: init scripts and ssl configuration.

The xapi RPM has been stripped to a minimal configuration.
Build xapi
Add virtual xenserver package
Remove some unnecessary runtime dependencies on ocaml
Merge pull request #66 from djs55/make-srpms

Make srpms
xapi: put xapi in /usr/sbin, not /usr/bin
xapi: add dep on xcp-inventory
xcp-inventory: actually create the configured directory in this package
xapi: add pci-info and pool.conf
xapi: correct path of pci-info
xapi: put pool.conf in /etc/xcp/pool.conf
xenserver: add dependency on 3.4 or greater kernel
Add the camomile UTF library
Add and build zed