Spinner: Changed default for numberformat to null. Fixed disabled opt…

…ion to not prevent changing value via step and page methods. OVerhauled testsuite.

demos/spinner/decimal.html

@@ -17,7 +17,8 @@
	<script type="text/javascript">
	$(function() {
		$("#spinner").spinner({
			step: 0.01
			step: 0.01,
			numberformat: "n"
		});	
		
		$("#culture").change(function() {

tests/unit/spinner/spinner.html

@@ -7,6 +7,7 @@

	<script type="text/javascript" src="../../../jquery-1.4.3.js"></script>
	<script type="text/javascript" src="../../../external/jquery.mousewheel-3.0.4.js"></script>
	<script type="text/javascript" src="../../../external/glob.js"></script>
	<script type="text/javascript" src="../../../ui/jquery.ui.core.js"></script>
	<script type="text/javascript" src="../../../ui/jquery.ui.widget.js"></script>
	<script type="text/javascript" src="../../../ui/jquery.ui.button.js"></script>