update README with new patch and godoc
update README with new patch and godoc

jmhodges/levigo,influxdata/rocksdb,DanielMorsing/rocksdb,influxdb/rocksdb,jmhodges/levigo_leveldb_1.4,evanphx/levigo,influxdb/hyperleveldb-go,influxdata/hyperleveldb-go,chanxuehong/goleveldb,influxdb/levigo,mikefaille/rocksdb-go,elijahandrews/levigo,alberts/gorocks,dckit/rocksdb