Adding date range configuration. This setting overrides the default of disabling all future dates, and instead allows the user to configure an array of [start,end] dates to limit the selectable dates.
Update datepicker.js

Use $.css rather than $.curCSS as its been depreciated since 1.3 and has been removed since 1.8.  

See:  http://blog.jquery.com/2012/08/09/jquery-1-8-released/

Thanks for the awesome piece of code.
Remove $.curCSS as the variable isn't used at all
merge branch to add selectable date range