Feature - Added auto close of dropdown calendars when clicking elsewhere
Feature - Added internationalization support for calendar, only en and fr provided until now
Some code cleanup

Tagged with the Id string all files that was not.

Bugfix: wrong usage of Calendar.select() method replaced with a nicer, non-firing event, Calendar.cfg.setProperty()

Bugfix: refresh is done at each click (calendar drop-down)

Feature: added drop-down support for calendar

First (not stable) commit of yui_form module. This module intends to provide simple FAPI form elements for developers to use YUI JS library.