Make default public and ovveridable

This change is really useful when we need to specify the default for a project based on current culture info.
By this point every project could specify the default for each page or, such in my case, in .NET MVC (or Asp.NET) in the master specify the global default.
In example:

    <script type="text/javascript" src="js/jquery.autoNumeric.js" />
    <script type="text/javascript">
        $(document).ready(function () {
            $.extend($.fn.autoNumeric.defaults, {
                aSep: '@System.Threading.Thread.CurrentThread.CurrentCulture.NumberFormat.NumberGroupSeparator',
                aDec: '@System.Threading.Thread.CurrentThread.CurrentCulture.NumberFormat.NumberDecimalSeparator'
            });
        });
    </script>

You can override all the default values as you want by this way.
Hope this will help someone out there!

Peter