ng-if broke the show-errors #54

Hi,

I've been using this directive in many forms, and it works like a charm.

Just one trouble i'm getting is about a form which has 2 states > non editable ; editable.
I'm using a boolean on my controller + ng-if on label & input to show just a static label or an input.

Once a ng-if is added on my input, show-errors directive won't work at all on the field.

I forked the default plunker with an easy example > email input is showed only if Name is filled with something.
http://plnkr.co/edit/4y48oj3xlBptcjqp4rws?p=preview

Any idea on how to keep show-errors working with ng-if ?

Thanks a lot, and keep the good work :-)