refs #7904 - add autocomplete support for nutupane

by default nutupane will use autocomplete from the resource
if it provides an autocomplete function.  Otherwise it will use a
fetchAutocomplete function that can be added to the nutupane.table
within the desired controller
I thought i had tried referenceing 'resource' and it didn't work, but i must be thinking of self.table.resource (which is updated)