Setting ng-model $dirty when value changes

[jmkenz]

I wasn't able to find a configuration option to enable this, so I've written my own decorator directive to fit the bill:

jmkenz/angularMultiSelectDirty.js

Is this how you would have handled it? Should this be built into your core directive?

[alexandernst]

This library doesn't quite work as the other "usual" input libraries. This library has an input model (that shouldn't be changed from the library) and an output model (that should be changed form the library).

If your code works for you, I'm glad, but if I'd accept something like that, it should be focused on marking the output model as dirty, not the input model.