Switch from Godep to go vendoring

vendor/github.com/blevesearch/bleve/search/explanation.go

@@ -0,0 +1,29 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//  Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
+//  except in compliance with the License. You may obtain a copy of the License at
+//    http://www.apache.org/licenses/LICENSE-2.0
+//  Unless required by applicable law or agreed to in writing, software distributed under the
+//  License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+//  either express or implied. See the License for the specific language governing permissions
+//  and limitations under the License.
+
+package search
+
+import (
+	"encoding/json"
+	"fmt"
+)
+
+type Explanation struct {
+	Value    float64        `json:"value"`
+	Message  string         `json:"message"`
+	Children []*Explanation `json:"children,omitempty"`
+}
+
+func (expl *Explanation) String() string {
+	js, err := json.MarshalIndent(expl, "", "  ")
+	if err != nil {
+		return fmt.Sprintf("error serializing explanation to json: %v", err)
+	}
+	return string(js)
+}