snapshot - src: Documentation of the "CREATE SNAPSHOT LOG" WITH clause.

Log Message:
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Documentation of the "CREATE SNAPSHOT LOG" WITH clause.
All functions now places on BASE_SCHEMA.

Modified Files:
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root:
USAGE.html (r1.4 -> r1.5)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/snapshot/root/USAGE.html.diff?r1=1.4&r2=1.5)
USAGE.txt (r1.7 -> r1.8)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/snapshot/root/USAGE.txt.diff?r1=1.7&r2=1.8)
USO.html (r1.4 -> r1.5)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/snapshot/root/USO.html.diff?r1=1.4&r2=1.5)
USO.txt (r1.7 -> r1.8)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/snapshot/root/USO.txt.diff?r1=1.7&r2=1.8)
src/sql:
pgsnapshots_create_snapshot.sql (r1.9 -> r1.10)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/snapshot/src/sql/pgsnapshots_create_snapshot.sql.diff?r1=1.9&r2=1.10)
pgsnapshots_dblink.sql (r1.4 -> r1.5)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/snapshot/src/sql/pgsnapshots_dblink.sql.diff?r1=1.4&r2=1.5)
pgsnapshots_drop_snapshot.sql (r1.7 -> r1.8)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/snapshot/src/sql/pgsnapshots_drop_snapshot.sql.diff?r1=1.7&r2=1.8)
pgsnapshots_refresh_snapshot.sql (r1.6 -> r1.7)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/snapshot/src/sql/pgsnapshots_refresh_snapshot.sql.diff?r1=1.6&r2=1.7)
pgsnapshots_snapshotlog.sql (r1.3 -> r1.4)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/snapshot/src/sql/pgsnapshots_snapshotlog.sql.diff?r1=1.3&r2=1.4)
pgsnapshots_tables.sql (r1.2 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/snapshot/src/sql/pgsnapshots_tables.sql.diff?r1=1.2&r2=1.3)