Add example for interacting with react inputs

[joevandyk]

I have an angularjs application that needs to use a reactjs component. The component contains a few input and select elements. When the inputs change, angularjs should be notified about that somehow (via events, callback functions, or something else). I'd want a function on the $scope called, or the model updated, or something.

I think this is a fairly common use case, but I couldn't find any documented/blessed way of doing so with this library.

[kasperp]

@joevandyk thanks for you issue. You are right we need to a example that illustrates how to "get data back to angular". Until we have that please see #11 (comment) for the approach that I have taken.