Add a little more verbosity to the IPMI discovery recipe.
ipmi-master role needs to install after the provisioner set up our repos.
Fix typo in ipmi.rb for the pxeboot method
Add a WSMAN-based Power module

For now, it only works on the IDRAC 7, but it demonstrates that we can
use the openwsman Ruby bindings directly.
Merge pull request #3 from VictorLowther/add-wsman-based-power-control

Add wsman based power control