jQuery v3 compatibility hack against jQuery easing v1.3

jig-jQuery-v3-hack.js

	// jQuery v3 *requires* easing functions in this new format..
	// if the site uses old (pre-v1.4) jQuery easing plugins, animations don't work, hence the need to create JIG's own
	// jQuery v1-v2 uses the new format but is fine with the legacy format too..
	$.extend( $.easing, {
		// opacity changes and fades are fine with swing
		JIGswing: function(p) {
			return 0.5 - Math.cos(p*Math.PI)/2;
		},
		// for 2D movements
		JIGeaseInOutQuad: function(x) {
			return x < 0.5 ? 2*x*x : 1-Math.pow(-2*x+2, 2)/2;
		}
	});