yet another fix for #216

fixes #216 - Validate uniqueness of a parameter name for Individual hosts

Fixes #240 - Clone operation highlights changes correctly

The clone operation no longer flags edits as errors. This looks better.

fixes #233 - In the "Show" page for a Host, Build link should not be visible when Unattended is false.

Fixes #179 - allow mass assignment of parameters and host groups.
Greatly inspired by Ashay Humane <ashay.humane@gmail.com> at 5c2e395c

fixes #180 - Query to return more information

fixes #223 - When a host update has errors then the render :edit loses required variables

Fixes #132 - Added a clone operation

This clones the AR, attaches clones of the
originals 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 #183 - Adds searchbar facility to hosts

Qualified the fact_selected partial
Added a reset button
Added popup help
Beautification and grooming

fixes #238 - Report wrong marked