Merge branch 't3539-autosync-messageChain-template'
change op_api_message First arg SendMessageData to MessageSendList. (refs #3540)
Excluded the definition of unnecessary member variables (refs #3540)
Add arg $useIsReadFlag to op_api_message() function. (refs #3540)
Add message/recentList action for api (refs #3540)
(refs #3540) Not call recent message list in pc_frontend message/receiveList action.
Auto asynchronous update recent message data. (refs #3540)
Merge branch 't3540-autosync-messageList-template' of github.com:ShinichiU/opMessagePlugin into t-3540