snapshot - src: 1) Using cursors for fetching data (at least when doing

Log Message:
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1) Using cursors for fetching data (at least when doing a Complete Refresh);
2) Fix an invalid commit when Autocommit is active at 'src/sql/pgsnapshots_refresh_snapshot.sql'

Modified Files:
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src/pl:
performCompleteRefresh.pl (r1.4 -> r1.5)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/snapshot/src/pl/performCompleteRefresh.pl.diff?r1=1.4&r2=1.5)
src/sql:
pgsnapshots_refresh_snapshot.sql (r1.8 -> r1.9)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/snapshot/src/sql/pgsnapshots_refresh_snapshot.sql.diff?r1=1.8&r2=1.9)

Added Files:
-----------
src/pl/db:
cursor.pl (r1.1)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/snapshot/src/pl/db/cursor.pl?rev=1.1&content-type=text/x-cvsweb-markup)
src/pl/db/oracle:
cursor.pl (r1.1)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/snapshot/src/pl/db/oracle/cursor.pl?rev=1.1&content-type=text/x-cvsweb-markup)
src/pl/db/pg:
cursor.pl (r1.1)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/snapshot/src/pl/db/pg/cursor.pl?rev=1.1&content-type=text/x-cvsweb-markup)