[jQuery] [treeview] Suggestion: function callback after async update

[Dominik Deobald]

Just a quick suggestion for future versions of treeview:

I've added

                if (typeof(settings.asyncload) == 'function') {
                        settings.asyncload(container);
                }

at the end of the async load function to be able to inject some of my
own code after an AJAX request.