snapshot - src: ON PREBUILT TABLE implementation: * Create snapshot

Log Message:
-----------
ON PREBUILT TABLE implementation:
* Create snapshot modifications done.
* Drop snapshot modifications done.

Modified Files:
--------------
src/pl:
createLocalSnapshot.pl (r1.2 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/snapshot/src/pl/createLocalSnapshot.pl.diff?r1=1.2&r2=1.3)
createRemoteSnapshot.pl (r1.2 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/snapshot/src/pl/createRemoteSnapshot.pl.diff?r1=1.2&r2=1.3)
getSthColumnTypes.pl (r1.1.1.1 -> r1.2)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/snapshot/src/pl/getSthColumnTypes.pl.diff?r1=1.1.1.1&r2=1.2)
map2PgType.pl (r1.1.1.1 -> r1.2)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/snapshot/src/pl/map2PgType.pl.diff?r1=1.1.1.1&r2=1.2)
src/sql:
pgsnapshots_create_snapshot.sql (r1.3 -> r1.4)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/snapshot/src/sql/pgsnapshots_create_snapshot.sql.diff?r1=1.3&r2=1.4)
pgsnapshots_drop_snapshot.sql (r1.3 -> r1.4)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/snapshot/src/sql/pgsnapshots_drop_snapshot.sql.diff?r1=1.3&r2=1.4)
pgsnapshots_refresh_snapshot.sql (r1.2 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/snapshot/src/sql/pgsnapshots_refresh_snapshot.sql.diff?r1=1.2&r2=1.3)

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