snapshot - src: ENH: message functions

Log Message:
-----------
ENH: message functions

Modified Files:
--------------
    src/sql:
        pgsnapshots_refresh_snapshot.sql (r1.13 -> r1.14)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/snapshot/src/sql/pgsnapshots_refresh_snapshot.sql?r1=1.13&r2=1.14)
        pgsnapshots_create_snapshot.sql (r1.12 -> r1.13)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/snapshot/src/sql/pgsnapshots_create_snapshot.sql?r1=1.12&r2=1.13)
        pgsnapshots_snapshotlog.sql (r1.6 -> r1.7)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/snapshot/src/sql/pgsnapshots_snapshotlog.sql?r1=1.6&r2=1.7)
        pgsnapshots_drop_snapshot.sql (r1.9 -> r1.10)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/snapshot/src/sql/pgsnapshots_drop_snapshot.sql?r1=1.9&r2=1.10)
        pgsnapshots_dblink.sql (r1.6 -> r1.7)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/snapshot/src/sql/pgsnapshots_dblink.sql?r1=1.6&r2=1.7)