yet another fix for #216
Fixes #132 - Added a clone operation
This clones the AR, attaches clones of theoriginals host_parameters and then renders the "new" action, ready for editing.
The host_parameters must not use validate_presence of :host_id when using nested attributes.Created a hidden :nested attribute to the form to flag this behaviour...
fixes #201 - Remove activescaffold from the domains page
added domain and common specific parameters.this adds a similar functionality to extlookup.the order in which parameters are processed is:common => domain => hostgroup => hostwhere the latest occurrence of a parameter takes priority.