Allow components interpolation #37

It would be helpful if we could use components as named arguments.

Suppose I have this message source:

{post: {posted_by: 'Posted by {author}'}}

And I want to display a tag with bindings or any kind of component in the place of {author}:

Posted by <a class="foo" v-link="{name: 'author', params: {id: post.author.id}}">Foo</a>

Currently, there is no way to do something like this:

{{{ $t('post.posted_by', {author: myComponent}) }}}