Add player stats.

Signed-off-by: Y.Moon <chglove@live.cn>
Add transition complete callback.

Signed-off-by: Y.Moon <chglove@live.cn>
Handle stats, health and mana update msgcode.

Signed-off-by: Y.Moon <chglove@live.cn>
UI update.

Signed-off-by: Y.Moon <chglove@live.cn>