angular-ui/ui-select — pull request #293 by benri (2014-10-11 20:48:07+00:00)
Title: Add option to allow duplicate items in multi-select

I added an option to allow selecting duplicate items for multi-select.

It's just an attribute on the ui-select level:
```html
...
```
and I copied the match-multiple templates with the only change that ng-repeat does `track by $index`