URL support for parsing (feature)

[Courtcircuits]

I'm working on a project using golang-ical. But the thing is that I need to parse a calendar accessible by a URL.
Here is my show-case :

// parse an ical url to instantiate a Calendar
func NewCalendar(url string) Calendar {
	cal, err := ics.ParseCalendar(url)
	return Calendar{
		Url: url,
                Events: cal,
	}
}

The javascript's ical library provides this kind of feature, but I don't want to use javascript to do that.
By the way, I can work on this issue. I just wanted to know if it might be helpful for this project to add such a feature (I will fork the project anyway).

[arran4]

It could be useful for some people depending on how it's done. People might want to provide their own http.Client or http.Request for HTTP auth, rest apis, etc. It would be a bit of work to make it that flexible but happy to consider a PR for some simple implementations. I like util funcs.

[Courtcircuits]

Ok, I will make a PR for the fork that I made then.

[arran4]

Cool. I will take a look.

[arran4]

Resolved conflicts in: #102

Please review I will probably try merge it this weekend