#993148 Use url() for link to date format page in date widget settings so it works without clean urls.

More clean up of formatters and formatter settings, more re-organization to make the code easier to maintain.

Re-organize all the field hooks into a single file and add the formatter settings form and summary. This will probably see more changes, this is a first pass.

Refactor Date Tools and the Date Wizard. It will create date fields, but fails to create content types to put them on, so more work still needed.

#239900, #249399 Limit available formats for Date Popup to available formats and hide custom format code which won't work right here.

New method for handling multiples -- use custom handling so we don't get AHAH values on the repeat date form, then call the Content module's form to get the benefit of using the Content module handling for regular repeats.

Working on getting multiple values working with the add more button. Partially working, still some errors.