examples/weatherbot.pl tweaks

	modified:   examples/weatherbot.pl
Request::Forecast subclass

	modified:   lib/POEx/Weather/OpenWeatherMap/Request/Forecast.pm
Request tests, related fixes

	modified:   lib/POEx/Weather/OpenWeatherMap.pm
	modified:   lib/POEx/Weather/OpenWeatherMap/Request/Forecast.pm
	modified:   t/class/openweathermap/request/current.t
	modified:   t/class/openweathermap/request/forecast.t