Fix for IE With Select Year/Month and Setting Highlighted Date

[andrewburgess]

Issue can be seen here: http://jsfiddle.net/andrewburgess/Q5F6Q/ using version from 2/14/2014

Using the following instantiation:

$('input').pickadate({
    selectYears: 30,
    onStart: function () {
        this.set('highlight', 824330296545);
    }
});

Trying to change the year triggers two change events. The first is correct, but the second will end up turning the selectYear to 1900