net helper functions

Not used anywhere (yet)
Initial commit for the pxe validation test case
Merge pull request #696 from seandst/socket-helper

net helper functions
Dispatch properly on DHTMLSelect
Allow Callables as form items, re-dispatch on actions
Add explorer schema test
port infra vms to use new framework
Merge pull request #687 from weissjeffm/automate5

Add Explorer Class Schema CRUD and test
Merge pull request #692 from rananda/rananda

PXE System Image validation test case
Merge pull request #601 from dajohnso/port_vm

port infra vms to use new framework