Calling `replaceWith` instead of `transitionTo`

[buschtoens]

The {{link-to}} component allows you to invoke it with replace=true, which causes it to not call transitionTo, but replaceWith instead. Like this:

{{#link-to "some.route" replace=true}}
  Link Text
{{/link-to}}

Would be nice, if we could do the something similar with {{href-to}}. Since the helper can't attach meta info to the <a> tag, we can't do it as a named param for the helper. Instead I propose allowing users to set a data-href-replace attribute on the tag, kinda like we already do for ignoring links:

ember-href-to/addon/href-to.js

Lines 46 to 48 in 36c2fa8

	isNotIgnored() {
	return !this.target.attributes['data-href-to-ignore'];
	}

So this would look like

<a href={{href-to "some.route"}} data-href-replace>
  Link Text
</a>