Add emoji icons for printing given a parameter

[andersfischernielsen]

This pull requests adds support for printing emoji icons instead of the ASCII/SVG icons.
The parameter --use-emoji-icon has been added along with a switch statement for the different emojis (based on the existing code).

I'm new to Go so I'm unsure if the error handling in

weather/forecast/print.go

Lines 264 to 274 in 818d1ad

	var err error
	var icon string
	if emojiIcons {
	icon, err = getEmojiIcon(forecast.Currently.Icon)
	} else {
	icon, err = getIcon(forecast.Currently.Icon)
	}
	if err != nil {
	return err
	}

is correct. Let me know!

[ghost]

Found some fixes!

P.S. share your ideas, feedbacks or issues with us at https://github.com/fixmie/feedback (this message will be removed after the beta stage).

[andersfischernielsen]

This might resolve #52, by the way.