datepicker: dynamically specifying the date format of a datepicker-popup

[pierregm]

I need to find a way for a user to modify the date format of a angularUI bootstrap datepicker (v0.6.0/1.0.7)

Here's an example of what I'm trying to do:
http://plnkr.co/edit/CsLCEI6nzNMrTpK0EGp3
As you can see, my dformat isn't properly recognized as a valid format string by the first datepicker (even if its value should be).