Listeners are not vue instance specific

[aarondfrancis]

In the situation where there are multiple, identical components on the page each registering event listeners, the listeners are not instance specific.

For example, if there is a list of comment components and each component has a model listener for comment.update.success then whenever any model fires that event, every component hears it. This may be desired behavior in some cases, but not in others.

I think the default should be instance-specific, and global listeners should be added differently.

Thoughts?