add go1.4 build tag to cznicb KVStore

This is because github.com/cznic/b depends on sync.Pool.

config.go

@@ -100,7 +100,6 @@ import (
 
 	// kv stores
 	_ "github.com/blevesearch/bleve/index/store/boltdb"
-	_ "github.com/blevesearch/bleve/index/store/cznicb"
 	_ "github.com/blevesearch/bleve/index/store/gtreap"
 	_ "github.com/blevesearch/bleve/index/store/inmem"
 

config_cznicb.go

@@ -0,0 +1,16 @@
+//  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.
+
+// +build go1.4
+
+package bleve
+
+import (
+	_ "github.com/blevesearch/bleve/index/store/cznicb"
+)

index/store/cznicb/cznicb.go

@@ -9,6 +9,8 @@
 //  express or implied. See the License for the specific language
 //  governing permissions and limitations under the License.
 
+// +build go1.4
+
 // Package cznicb provides an in-memory implementation of the KVStore
 // interfaces using the cznic/b in-memory btree.  Of note: this
 // implementation does not have reader isolation.