l.a.w.date : module documentation

These widgets use the a YUI2 calendar widget to allow for date and datetime selection.

To avoid adding the YUI2 page-weight to launchpad.js, the relevant files need to be included on the individual pages using the widget. See templates/archive-subscribers.pt for an example.

We should investigate zc.datewidget available from the Z3 SVN repository.

Class	DateTimeWidget	A date and time selection widget with popup selector.
Class	DateWidget	A date selection widget with popup selector.
Class	DatetimeDisplayWidget	Display timestamps in the users preferred time zone