bizgres - bizgres: Added vacuuming support for the bitmap index.

Log Message:
-----------
Added vacuuming support for the bitmap index.

Modified Files:
--------------
bizgres/postgresql/src/backend/access/bitmap:
bitmap.c (r1.5 -> r1.6)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/bizgres/bizgres/postgresql/src/backend/access/bitmap/bitmap.c.diff?r1=1.5&r2=1.6)
bitmapinsert.c (r1.5 -> r1.6)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/bizgres/bizgres/postgresql/src/backend/access/bitmap/bitmapinsert.c.diff?r1=1.5&r2=1.6)
bitmappages.c (r1.4 -> r1.5)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/bizgres/bizgres/postgresql/src/backend/access/bitmap/bitmappages.c.diff?r1=1.4&r2=1.5)
bitmaputil.c (r1.5 -> r1.6)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/bizgres/bizgres/postgresql/src/backend/access/bitmap/bitmaputil.c.diff?r1=1.5&r2=1.6)
bitmapxlog.c (r1.4 -> r1.5)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/bizgres/bizgres/postgresql/src/backend/access/bitmap/bitmapxlog.c.diff?r1=1.4&r2=1.5)
bizgres/postgresql/src/backend/commands:
vacuum.c (r1.1.1.2.2.1 -> r1.2)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/bizgres/bizgres/postgresql/src/backend/commands/vacuum.c.diff?r1=1.1.1.2.2.1&r2=1.2)
bizgres/postgresql/src/backend/executor:
execUtils.c (r1.1.1.2.2.1 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/bizgres/bizgres/postgresql/src/backend/executor/execUtils.c.diff?r1=1.1.1.2.2.1&r2=1.3)
bizgres/postgresql/src/include/access:
bitmap.h (r1.5 -> r1.6)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/bizgres/bizgres/postgresql/src/include/access/bitmap.h.diff?r1=1.5&r2=1.6)