Add dynamic identifier on input type created by ng-file-upload directive.

i have two separate upload button for angular-file-upload. They both create separate input elements at the bottom of the body. As they look alike ( cannot be distinguished ). I want to differentiate them for testing purpose (e2e test selenium webdriver) by passing optional paramater to the directive, but they are treated as string and not evaluated on the input element. I have used new doctype attribute.

[danialfarid]

Feature added at version 10.0.3. If you specify an id for your element, the input type file will have that id prefixed with ngf-. So

<div id="myid" ngf-select>

will create

<input type="file"  id="ngf-myid" ...>

[vjuras]

Here is separate issue #1529