dbi-link - dbi-link: Moved PostgreSQL test and example to their own

Log Message:
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Moved PostgreSQL test and example to their own directory.

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

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