Added bindingInfo to binding exception

[cbastos]

Added DOM element node and binding context info to 'unable to process binding' exception.
With this change we can retrieve more info in exception management:

For example: viewmodel constructor and failing dom element node.
ko.onError = function(e){
console.log({ viewModel : e.bindingInfo.context["$component"].constructor , node : e.bindingInfo.node });
}

[brianmhunt]

This was one of the first issues addressed and will definitely be covered in tko. ( when it builds ... Soon! )

this is a pretty innocuous add to ko 3.4 but probably not API compatible going forward.

Want to leave it open or wait for tko?

[cbastos]

I would like to be included in both versions :)