#10 PEAR::DB/postgresql support

[Jer]

Changed all mysql_* calls to PEAR::DB calls.
Changed a few mysql specific SQL functions to
generic/postgresql functions.
(CURDATE->CURRENT_DATE), (GROUP BY n ORDER BY m ->
GROUP BY n,m ORDER BY m)

[Jer]

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Additional comment: UNIX_TIMESTAMP() function is not defined
is PostgreSQL as the following:

CREATE FUNCTION UNIX_TIMESTAMP(timestamp) RETURNS timestamp
AS 'select $1 as timestamp;' LANGUAGE SQL;

Insert this function into your PostgreSQL database if FOF
complains about a missing function.

[Jer]

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user_id=804977

Found a better UNIX_TIMESTAMP function from here:
http://www.xach.com/aolserver/mysql-to-postgresql.html

drop function unix_timestamp(timestamp);
create function unix_timestamp(timestamp) returns integer as '
select date_part(''epoch'', $1)::int4 as result
' language 'sql';

Also update the patch to fix a CSS bug (added "clear:both"
tag to "item" divs), and to fix some SQL 'backtick' bugs.

[Jer]

PEAR::DB/PostgreSQL patch v0.2