npgsql - Npgsql2: [#1011008] Add PhysicalAddress (MAC Address) support

Log Message:
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[#1011008] Add PhysicalAddress (MAC Address) support to Npgsql. Thanks Gildas for patche and test case.

Modified Files:
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    Npgsql2/src/NpgsqlTypes:
        NpgsqlDbType.cs (r1.15 -> r1.16)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/npgsql/Npgsql2/src/NpgsqlTypes/NpgsqlDbType.cs?r1=1.15&r2=1.16)
        NpgsqlTypeConverters.cs (r1.21 -> r1.22)

(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/npgsql/Npgsql2/src/NpgsqlTypes/NpgsqlTypeConverters.cs?r1=1.21&r2=1.22)
        NpgsqlTypes.cs (r1.14 -> r1.15)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/npgsql/Npgsql2/src/NpgsqlTypes/NpgsqlTypes.cs?r1=1.14&r2=1.15)
        NpgsqlTypesHelper.cs (r1.37 -> r1.38)

(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/npgsql/Npgsql2/src/NpgsqlTypes/NpgsqlTypesHelper.cs?r1=1.37&r2=1.38)
    Npgsql2/testsuite/noninteractive/NUnit20:
        TypesTests.cs (r1.9 -> r1.10)

(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/npgsql/Npgsql2/testsuite/noninteractive/NUnit20/TypesTests.cs?r1=1.9&r2=1.10)