pgloader - pgloader: * Rework DatabaseError and consider dichotomy in

Log Message:
-----------
* Rework DatabaseError and consider dichotomy in this case too.
* New options lc_messages and log_file

Modified Files:
--------------
    pgloader:
        pgloader.1.txt (r1.8 -> r1.9)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgloader/pgloader/pgloader.1.txt.diff?r1=1.8&r2=1.9)
        pgloader.py (r1.15 -> r1.16)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgloader/pgloader/pgloader.py.diff?r1=1.15&r2=1.16)
    pgloader/debian:
        changelog (r1.13 -> r1.14)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgloader/pgloader/debian/changelog.diff?r1=1.13&r2=1.14)
    pgloader/examples:
        pgloader.conf (r1.12 -> r1.13)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgloader/pgloader/examples/pgloader.conf.diff?r1=1.12&r2=1.13)
    pgloader/pgloader:
        db.py (r1.11 -> r1.12)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgloader/pgloader/pgloader/db.py.diff?r1=1.11&r2=1.12)
        logger.py (r1.2 -> r1.3)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgloader/pgloader/pgloader/logger.py.diff?r1=1.2&r2=1.3)
        options.py (r1.11 -> r1.12)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgloader/pgloader/pgloader/options.py.diff?r1=1.11&r2=1.12)
        tools.py (r1.7 -> r1.8)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgloader/pgloader/pgloader/tools.py.diff?r1=1.7&r2=1.8)