python - lo: Rework doc strings.

Log Message:
-----------
Rework doc strings.
The context of PostgreSQL has already been established, so don't repeat
'PostgreSQL' in every doc string.
Update some URLs and addresses in setup.

Tempted to provide more descriptive doc strings, but it really belongs in doc.

Modified Files:
--------------
lo:
setup.py (r1.3 -> r1.4)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/lo/setup.py.diff?r1=1.3&r2=1.4)
lo/postgresql:
__init__.py (r1.2 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/lo/postgresql/__init__.py.diff?r1=1.2&r2=1.3)
lo/postgresql/backend:
__init__.py (r1.2 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/lo/postgresql/backend/__init__.py.diff?r1=1.2&r2=1.3)
lo/postgresql/backend/interface:
__init__.py (r1.2 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/lo/postgresql/backend/interface/__init__.py.diff?r1=1.2&r2=1.3)
lo/postgresql/exception:
__init__.py (r1.1 -> r1.2)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/lo/postgresql/exception/__init__.py.diff?r1=1.1&r2=1.2)
lo/postgresql/interface:
__init__.py (r1.2 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/lo/postgresql/interface/__init__.py.diff?r1=1.2&r2=1.3)
lo/postgresql/meta:
__init__.py (r1.2 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/lo/postgresql/meta/__init__.py.diff?r1=1.2&r2=1.3)
lo/postgresql/meta/interface:
__init__.py (r1.2 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/lo/postgresql/meta/interface/__init__.py.diff?r1=1.2&r2=1.3)
lo/postgresql/utility:
__init__.py (r1.1 -> r1.2)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/lo/postgresql/utility/__init__.py.diff?r1=1.1&r2=1.2)
lo/postgresql/utility/client:
__init__.py (r1.1 -> r1.2)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/lo/postgresql/utility/client/__init__.py.diff?r1=1.1&r2=1.2)