orafce - orafce: Add bitand() and fix regression tests.

Log Message:
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Add bitand() and fix regression tests.

Modified Files:
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orafce:
README.orafunc (r1.28 -> r1.29)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/orafce/orafce/README.orafunc.diff?r1=1.28&r2=1.29)
orafunc.sql.in (r1.43 -> r1.44)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/orafce/orafce/orafunc.sql.in.diff?r1=1.43&r2=1.44)
orafce/expected:
orafunc.out (r1.13 -> r1.14)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/orafce/orafce/expected/orafunc.out.diff?r1=1.13&r2=1.14)
orafce/sql:
orafunc.sql (r1.12 -> r1.13)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/orafce/orafce/sql/orafunc.sql.diff?r1=1.12&r2=1.13)