update bolt info

README.md

@@ -8,7 +8,7 @@ LedisDB now supports multi database as backend to store data, you can test and c
 
 + Rich advanced data structure: KV, List, Hash, ZSet, Bit.
 + Stores lots of data, over the memory limit. 
-+ Various backend database to use: LevelDB, goleveldb, LMDB, RocksDB.  
++ Various backend database to use: LevelDB, goleveldb, LMDB, RocksDB, BoltDB.  
 + Supports expiration and ttl.
 + Redis clients, like redis-cli, are supported directly.
 + Multi client API supports, including Golang, Python, Lua(Openresty). 

bootstrap.sh

@@ -9,3 +9,5 @@ go get github.com/siddontang/copier
 go get github.com/siddontang/goleveldb/leveldb
 
 go get -d github.com/siddontang/gomdb
+
+go get github.com/boltdb/bolt