depend on leveldb, snappy, levigo

please refer to [this blog] (http://xjdrew.github.io/blog/2014/09/09/build-static-leveldb-with-snappy/) for how to build a snappy enabled leveldb.

source env.sh
go install app

• start a redis-server listen on 127.0.0.1:6300
• bin/app conf/settings.json
• use a redis client, run command as follow

hset key1 v1 1
rename key1 key2