python - be: Implement bool.typ* classmethods.

Log Message:
-----------
Implement bool.typ* classmethods.

bool is special cased to return Python's True or False, instead of an
PyPg_bool_Type instance.

Modified Files:
--------------
be/src/type:
bitwise.c (r1.3 -> r1.4)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/src/type/bitwise.c.diff?r1=1.3&r2=1.4)