Handlers do not work if html is empty string

[shabda]

To replicate:

return this (after) jsoning

`data = {"html": ""} from a view.

Html is:

<a href="/foo/" class="ajax" data-replace="#some-id">

The object doesn't get replaced.

Easy to work around by adding a space in returned html, but hard to debug if you hit this issue.

`data = {"html": ""}

[paltman]

@shabda: Are you sure you want to remove the DOM element or just set the inside of the element to blank?

[shabda]

@paltman : Yeah we could just use data-remove in this cases. Should have read the docs a little more.