v2.1.6

Added weather data, general improvements and bug fixes

• Add weather data (#26) See: core.Lap.get_weather_data(), core.Laps.get_weather_data(), core.Session.weather_data

• Fix: error when calling core.Laps.get_pos_data() (#22)

• Fix: error when calling get_telemetry on the first lap (or a set of laps containing the first lap)

• Make the live timing client exit more cleanly