Fix networking.  Update to PE3.2.2.

This commit adds a module razor_ipv4_forward that sets ipv4 packet
forwarding in /etc/sysctl.conf.  I used vagrant to hack in a new
iptables rule to setup NAT MASQUERADE so network traffic for
the PXE boot machines can get out to the internet via the dhcp
server.

I also updated the machines to use PE3.2.2 instead of PE3.2.0
Update README
Add pe-httpd restart after changing modulepath

One of the times I brought of the stack it couldn't seem to find
my modules in /tmp/puppet/modules and the only reason I could think
of that would make that happen was that pe-httpd hadn't been restarted.
Add a NAT adapter for connecting to the console

In a previous commit I had to remove all of the NAT adapters because
they seemed to cuase the microkernel download on the PXE boot box
freeze.  I want users to be able to connect to the PE console
so I added the NAT adapter on the puppet-master back in and
everything appears to be working.