Add JS Smooth Scrolling Utility

[getdave]

Add this function to the globals

/**
 * Smooth Scrolling
 * utility function for attaching simple smooth scrolling
 * to anchors with a "hash" target in their href
 */
SITE.utils.smoothScroll = (function($) {
    $(document).ready(function(){
        $('body').on("click", ".js-smooth-scroll", function(e) {
            e.preventDefault();

            var target = $( $(this).attr('href') );

            var fudgeFactor = $(this).data('scroll-fudge-factor') || 0;

            jQuery('html, body').stop().animate({
                scrollTop: target.offset().top + fudgeFactor,
                easing: "swing",
                queue: false
            }, 2000);

        });
    });
}(jQuery));

[getdave]

Completed in feature branch. Will close via commit.