Merge pull request #294 from carlisliu/master

crateRange is removed, should use range instead.

lib/memcached.js

@@ -297,7 +297,7 @@ Client.config = {
         server = this.servers[0];
       } else {
         if (redundancy && queryRedundancy) {
-          redundancy = this.HashRing.createRange(query.key, (this.redundancy + 1), true);
+          redundancy = this.HashRing.range(query.key, (this.redundancy + 1), true);
           server = redundancy.shift();
         } else {
           server = this.HashRing.get(query.key);