Support RHEL better in the Puppet broker

At least some versions of RHEL report `redhatenterpriseserver` rather than
just `redhat` in the (mangled) output from lsb_release(1).  This updates the
broker to recognise that more robustly.

This closes #76, which reported that.

Signed-off-by: Daniel Pittman <daniel@rimspace.net>
Implement node ID lookup from hardware ID details

This implements an API for a client to request their unique node ID, if
available, from the Razor server.  This allows the Windows client -- and any
future installer burdened by the same inability to get dynamic data fed
directly into it -- to hook up with the node definition.

That, in turn, allows it to enter the normal bootstrapping process without
having to dynamically generate an entire new Windows system image every time
we boot a node.  Probably a performance win. ;)

Signed-off-by: Daniel Pittman <daniel@rimspace.net>
PowerShell script to build a WinPE Razor client image

This is a PowerShell script capable of building out a Razor client WinPE
image, which we will then use to access and run the network installer.

Right now it is able to put together enough of an image to prove that we can
build WinPE, and boot it successfully, to trigger our test client script.

Notes:
 * tested only on Windows 8.0 with ADK

Requirements:
 * Install the ADK *IN THE DEFAULT LOCATION ON DISK!*
   * c:\program files (x86)\...
 * Have PowerShell.  (I have the version that shipped with Windows 8.)
 * Run the script.  Bam.

Output:
 * A WIM file containing our modifications.

Signed-off-by: Daniel Pittman <daniel@rimspace.net>
Add wimboot 1.0.3 to the Windows installer

This adds the wimboot 1.0.3 binary to the Windows installer.  This is needed
to be able to boot the WIM image outfitted with the Razor client memory
efficiently, and works together with iPXE.

This was downloaded from the binary release available online at the iPXE
website: http://ipxe.org/wimboot#download

This is GPLv2 software, and source code for this binary is available at the
same location.

Signed-off-by: Daniel Pittman <daniel@rimspace.net>
Implement a Windows installer using wimboot

This is implemented using the Windows 8 ADK and CD source; it presently works
to boot an image (named `razor-winpe.wim`) build by our client image
PowerShell script on the target machine.

Once there this has sufficient support to send a second stage PowerShell
script from the installer that will obtain the auto-install data, connect to
the specified SMB server, then fire up the Windows installer.

That uses an autoinstall XML file generated on the server, and manages
notification to the Razor server on completion and rebooting.  On first boot
the system should correctly proceed to process specialization and other
installer passes automatically with no further involvement from Razor.

Signed-off-by: Daniel Pittman <daniel@rimspace.net>