Log Message:
-----------
Handle negative values (thanks to Mathieu Fenniak <mathieu(at)fenniak(dot)net>) and singular values such as "1 day"
Modified Files:
--------------
Npgsql2/src/NpgsqlTypes:
DateDatatypes.cs (r1.2 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/npgsql/Npgsql2/src/NpgsqlTypes/DateDatatypes.cs.diff?r1=1.2&r2=1.3)