add some current + forecast JSON for tests

	new file:   t/inc/3day.json
	new file:   t/inc/current.json
test outline

	new file:   t/class/openweathermap.t
	new file:   t/class/openweathermap/error.t
	new file:   t/class/openweathermap/request.t
	new file:   t/class/openweathermap/request/current.t
	new file:   t/class/openweathermap/request/forecast.t
	new file:   t/class/openweathermap/result.t
	new file:   t/class/openweathermap/result/current.t
	new file:   t/class/openweathermap/result/forecast.t
	new file:   t/class/openweathermap/units.t