dbi-link - dbi-link: Set dbi_link.sql to create a separate schema for

Log Message:
-----------
Set dbi_link.sql to create a separate schema for its functions.

Created table to hold DBI connection info in text format.

Folded DBI.sql into dbi_link.sql

Added table to dbi_link schema to store DBI connection info.

Added shadow table/trigger system to enable INSERTs, UPDATEs and DELETEs.

Modified Files:
--------------
dbi-link:
README.txt (r1.2 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/dbi-link/dbi-link/README.txt.diff?r1=1.2&r2=1.3)
make_connection.sql (r1.4 -> r1.5)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/dbi-link/dbi-link/make_connection.sql.diff?r1=1.4&r2=1.5)
remote_query.sql (r1.1 -> r1.2)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/dbi-link/dbi-link/remote_query.sql.diff?r1=1.1&r2=1.2)

Added Files:
-----------
dbi-link:
dbi_link.sql (r1.1)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/dbi-link/dbi-link/dbi_link.sql?rev=1.1&content-type=text/x-cvsweb-markup)

Removed Files:
-------------
dbi-link:
DBI.sql
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/dbi-link/dbi-link/DBI.sql)