Iconic images don't work with directives

[soumak77]

When using the following code

<img zf-iconic="" ng-show="..." />

The img element is replaced with a svg element. The ng-show attribute is not copied from the img element to the svg element. This also goes for the other directives I've tried ng-hide, ng-show, and ng-click. I would guess that this is true for all directives.