True Unique capability

[ivakegg]

The request is to be able to modify the unique capability to return documents that are truely unique within the context of the results. This means that only those unique results that actually only existed once in the non-uniquified result set are returned. I am thinking that this can be extended to specify a max-count on the unique results such that those unique results that only occured up to the specfied max-count are actually returned.

[ivakegg]

Perhaps #MAX_UNIQUE_COUNT(1) && #UNIQUE(FIELD1,FIELD2)