* tz: add chat.logChat option;
* scanner: add const modifier for parameters scan_add api function;
* tz: add const modifier for parameters tz_chat_z static function;
* tz: log system message in chat when player leave room;
* conf: add sample config for chat options;
* chat: code optimization;
* message: add msg_clear api function;
* tabs: add tabs module;
* chat: use tabs module;
* cmd: use tabnum from tabs module;
* tz: add tz_chat_add function;
* room: chnage parameter room_add api function;
* tz: call room_add api function with new parameter;
* tz: set option chat.currentPlayer on start chat;
* chat: remove chat_set_me api function;
* chat: use chat.currentPlayer option for check current player;
* room: add mising header player.h;
* tz: log system message in chat when player enter in room;