add libraries pugixml https://github.com/zeux/pugixml and cppformat https://github.com/cppformat/cppformat to support localization
add base for localization https://github.com/HarpyWar/pvpgn/issues/13
Allow /quiz for everyone, but /quiz start|stop is only for server admin/operator https://github.com/HarpyWar/pvpgn/issues/34