evil-blocks.debug.js makes all the event listeners call the last callback function

After switching on `evil-blocks.debug.js` all the events that were specified on a block were calling the function of the last specified event. Here is the [plunker](http://plnkr.co/edit/T7Q8lEBVJdaps7Vg8QIP?p=preview) that shows the problem. When I try to switch between radio buttons the `submit` event fires, but not `change` as it should.

This pull request fixes this issue.