new commands Persist,Pexpire,Pexpireat,Psetex,Pttl,Quit,Randomkey,Save,Scriptflush,Scriptkill,Shutdown,Sinter,Sinterstore,Sismember,Smembers,Smove,Spop,Srandmember, Srem,Strlen and Unwatch. Protocol.java and Redist2TextProtocol.java updated, ProtocolTest done.