$interpolate quick-repeat-list attribute

[llchan]

It would be useful to interpolate the quick-repeat-list attribute so that the user has a little more flexibility in preventing name collisions in the global re-rendering service. The use case is e.g. multiple instances of a directive with custom re-rendering triggers.

I've addressed this in my local copy (it was super simple), and can/will submit a pull request when I have some time.

[allaud]

@llchan it would be really great! Waiting for PR from you.