message: remove msgpack
diff: @@ -434,11 +434,9 @@ $target = array (
  );
  $json = json_encode($target);
  $seri = serialize($target);
  -$msg = msgpack_pack($target);
  -$sw = swoole_serialize($target);
  +$sw = swoole_serialize::pack($target);
  var_dump("json :". strlen($json));
  var_dump("serialize :". strlen($seri));
  -var_dump("msgpack :". strlen($msg));
  var_dump("swoole :". strlen($sw));
  $stime = microtime(true);
  for ($i = 0; $i < 50000; $i ++) {
  @@ -468,30 +466,17 @@ for ($i = 0; $i < 50000; $i ++) {
  $etime = microtime(true);
  var_dump("unserialize :". ($etime - $stime));
  //----------------------------------
  -$stime = microtime(true);
  -for ($i = 0; $i < 50000; $i ++) {
  - msgpack_pack($target);
  -}
  -$etime = microtime(true);
  -var_dump("msgpack_pack :". ($etime - $stime));
  -//----------------------------------
  -$stime = microtime(true);
  -for ($i = 0; $i < 50000; $i ++) {
  - msgpack_unpack($msg);
  -}
  -$etime = microtime(true);
  -var_dump("msgpack_unpack :". ($etime - $stime));
  //----------------------------------
  //----------------------------------
  $stime = microtime(true);
  for ($i = 0; $i < 50000; $i ++) {
  - swoole_serialize($target);
  + swoole_serialize::pack($target);
  }
  $etime = microtime(true);
  var_dump("swoole_serialize :". ($etime - $stime));
  $stime = microtime(true);
  for ($i = 0; $i < 50000; $i ++) {
  - swoole_unserialize($sw);
  + swoole_serialize::unpack($sw);
  }
  $etime = microtime(true);
  var_dump("swoole_unserialize :". ($etime - $stime));
  