Proposal: Create a can-event-dom-enter/global module and import it in can/can

[justinbmeyer]

Until importing events into templates or other local registries exist, it's cumbersome to require people to do:

var domEvents = require('can-dom-events');
var enterEvent = require('can-event-dom-enter');

domEvents.addEvent(enterEvent);

Until behavior like canjs/can-stache-bindings#440 works, there's no actual integration point for custom events. So, I think we should create a can-event-dom-enter/global module that would add enter to the global registry.

We should make this module part of can/can so people don't have to do this for JSBins.

When we do have custom event registry support, then we can @hide this module.