Added an ISC DHCPd configuration example

This adds an example configuration file for the ISC DHCPd that will make it
work smoothly with razor-server.  Since we don't automatically configure DHCP
operation, this should ease integration for some folks.

This is not an example of using Puppet to configure the system, which is left
as an example for the reader.

Signed-off-by: Daniel Pittman <daniel@puppetlabs.com>
Add an example manifest for installing Razor using `puppet apply`

This is an example of how to use `puppet apply` to install razor-server, with
a little bit of stuff wrapped around it to make it look less odd, and to try
and stop people using it in a way that might really hurt them on the master.

Signed-off-by: Daniel Pittman <daniel@puppetlabs.com>