移除message相关协议.

Signed-off-by: jack <jack.wgm@gmail.com>
添加group协议.

Signed-off-by: jack <jack.wgm@gmail.com>
更新协议实现代码.

Signed-off-by: jack <jack.wgm@gmail.com>
更新vc项目文件.

Signed-off-by: jack <jack.wgm@gmail.com>
missing return...

Signed-off-by: jack <jack.wgm@gmail.com>