Patch: Add setDate/Time/Timestamp with Calendars

This patch implements the setDate/Time/Timestamp with Calendars.

If the user specifies a calendar, the setDate/Time/Timestamp will change
the time given into the target timezone. The base timezone is always the
local jvm timezone.

If the user doesn't specify a calendar, it is not used.

Here is a test. The test program is test.java. The first time is in PST.
The second in EST.

Before patch:

a
------------
1999-12-31
1999-12-31
(2 rows)

a
-------------
12:00:00-04
12:00:00-04
(2 rows)

a
----------
12:00:00
12:00:00
(2 rows)

a
------------------------
1999-12-31 12:00:00-05
1999-12-31 12:00:00-05
(2 rows)

a
---------------------
1999-12-31 12:00:00
1999-12-31 12:00:00
(2 rows)

After patch:

a
------------
1999-12-30
1999-12-31
(2 rows)

a
-------------
09:00:00-04
12:00:00-04
(2 rows)

a
----------
09:00:00
12:00:00
(2 rows)

a
------------------------
1999-12-31 09:00:00-05
1999-12-31 12:00:00-05
(2 rows)

a
---------------------
1999-12-31 09:00:00
1999-12-31 12:00:00
(2 rows)

Cheers,

Kim