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

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

Modified Files:
--------------
    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)