python - pq: Add classifiers and fix copyright dates.

Log Message:
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Add classifiers and fix copyright dates.
(Most/all of this code was written in 2005)

Modified Files:
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    pq:
        setup.py (r1.1.1.1 -> r1.2)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/pq/setup.py.diff?r1=1.1.1.1&r2=1.2)
    pq/src:
        __init__.py (r1.1.1.1 -> r1.2)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/pq/src/__init__.py.diff?r1=1.1.1.1&r2=1.2)
        buffer.py (r1.1.1.1 -> r1.2)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/pq/src/buffer.py.diff?r1=1.1.1.1&r2=1.2)
        client3.py (r1.5 -> r1.6)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/pq/src/client3.py.diff?r1=1.5&r2=1.6)
        element3.py (r1.4 -> r1.5)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/pq/src/element3.py.diff?r1=1.4&r2=1.5)
        version.py (r1.1.1.1 -> r1.2)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/pq/src/version.py.diff?r1=1.1.1.1&r2=1.2)