New datepicker implementation to create constancy throughout various tool's date and time selection mechanisms

The purpose of this new datepicker implementation in our project was to maintain full control over language generation and create constancy throughout various tool's date and time selection mechanisms.

datepicker.patch contains changes that need to be applied to the 'Reference' module. This mainly handles the front end implementations ( js, jquery libs, images etc.,) required for this datepicker implementation. The lang files used by the new datepicker is also included in this patch file. Here is the list of languages supported :

1. English
2. Spanish
3. French ( CA and FR locales)
4. Italian
5. Japanese
6.Korean
7.Dutch
8.Portuguese
9.Turkish
10.Chinese
11.German

I had trouble adding the image files to the patch. So the image files have been zipped up into an archive file ( datepicker_images.zip).

announcement_dp.patch contains changes that need to be applied to 'Announcement' module. This will replace the existing datepicker widget with the new datepicker widget in announcement tool.

Order for applying patch files:

1. datepicker.patch
2. copy the image files in the archive file datepicker_images.zip
3. announcement_dp.patch