Use outerHeight to get the full Height of the caption

Also simplified how often the caption height was used by adding it to sTop
User $.datepicker instead to get the selected date as a full string.
Not sure why, but this code breaks html5Numeric

Just commenting it out for now, I want to figure out why it's actually updating wrong and fix it but rather then releasing something broken till then commenting it out allows things to function again.
Forgot one $.datepicker call

Also cleaned up a few lines for consistancy
Add WidgetOptions -> stickyHeaders_zIndex option, this allows for the user to customize the zIndex of stickyHeaders to suit the needs of their site
Add user selectable optino for compare to uiDateCompare and html5Number, Issue #325
show any ajax request errors to the user in the table
Merge pull request #349 from camallen/ajax_error

show any ajax request errors to the user in the table