Adding methods for fetching daily and three hour forecast via geo-coords to the OWM25 class. Adding functional and unit tests for the two new OWM25 class methods: three_hours_forecast_at_coords(self, lat, lon), daily_forecast_at_coords(self, lat, lon, [limit]).
Merge pull request #45 from n0id/feature/#40_forecastcoords

Great job @n0id ! Thank you :)