[Bleve] Allow unlimited search results

Hello guys, Here is the demo of what I have faced in my project: ``` package main import ( "encoding/json" "flag" "fmt" "log" "os" "github.com/blevesearch/bleve" "github.com/blevesearch/bleve/mapping" ) func buildMapping() mapping.IndexMapping { textFieldMapping := bleve.NewTextFieldMapping() textFieldMapping.Analyzer = "en" userMapping := bleve.NewDocumentMapping() userMapping.AddFieldMappingsAt("name", textFieldMapping) indexMapping := bleve.NewIndexMapping() indexMapping.TypeField = "Type" indexMapping.DefaultAnalyzer = "en" indexMapping.AddDocumentMapping("user", userMapping) return indexMapping } var indexPath = flag.String("index", "index.bleeve", "index path") func main() { flag.Parse() defer os.RemoveAll(*indexPath) bleveIndex, err := bleve.Open(*indexPath) if err == bleve.ErrorIndexPathDoesNotExist { bleveIndex, err = bleve.New(*indexPath, buildMapping()) if err != nil { log.Fatal(err) } } fo