Properties defined with Props.Set() aren't escaped

[Dynom]

In line of our earlier discussion, escaping should happen without the user having to think about it. At the moment this isn't yet the case. The following two pieces of code have a different result:

e.Props.Set(&ical.Prop{
	Name:  ical.PropDescription,
	Value: `Hello world!\n-:-;`,
})
// produces: Hello world!\n-:-;

e.Props.SetText(ical.PropDescription, `Hello world!\n-:-;`)
// produces: Hello world!\\n-:-\;