don't fire change event on original select on instantiation

Hi @grahamscott,

ran into an issue, because on instantiation selleckt will fire a change event on the original select element in case it has a selected option. I belief this to be a behavior not being expected.

If something else has already bound a change handler to the original select element, it will be called, although the value has not changed.

Please have a look at the fix
Thanks