Incomplete facets when calling SearchResult.String()

[samiemad]

SearchResult.String() does not include NumericRange and DateRange Facets in the output. Resulting in facets with empty Terms. E.g.:

Facets:
    CreationDate (15):
    State (15):
        Done (15)

Correctly checking the f.NumericRanges and f.DateRanges when looping over the facets should fix it. (in here https://github.com/blevesearch/bleve/blob/master/search.go#L549)

With that fixed, it correctly checks for and appends the respective ranges along with their counts, as expected:

Facets:
    CreationDate (15):
        ThisWeek (10)
        Older (5)
    State (15):
        Done (15)