npgsql - Npgsql2: [#1003400] Later type binding for DbType.Object

Log Message:
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[#1003400] Later type binding for DbType.Object

Fixed problems with explicit parameter datatype casting. Now, whenever as parameter has a dbtype.object data type, the
castwill be turned off. This will revert the flexibility of letting the type specification to postgresql itself.  

If a user wants to turn cast on, just specify a dbtype value other than object or specify an NpgsqlDbType. See:
http://pgfoundry.org/forum/message.php?msg_id=1003583,http://pgfoundry.org/forum/message.php?msg_id=1003620 and
http://pgfoundry.org/tracker/index.php?func=detail&aid=1003400&group_id=1000140&atid=592for discussions about that.
Also,DbType.Object is mapped in NpgsqlTypesHelper as an alias to text datatype on internal mapping. 

Thanks Waldemar Bergstreiser and Andrus Moor for discussions about that.

Modified Files:
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    Npgsql2/src/Npgsql:
        NpgsqlCommand.cs (r1.22 -> r1.23)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/npgsql/Npgsql2/src/Npgsql/NpgsqlCommand.cs.diff?r1=1.22&r2=1.23)
        NpgsqlParameter.cs (r1.14 -> r1.15)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/npgsql/Npgsql2/src/Npgsql/NpgsqlParameter.cs.diff?r1=1.14&r2=1.15)
    Npgsql2/src/NpgsqlTypes:
        NpgsqlTypesHelper.cs (r1.15 -> r1.16)

(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/npgsql/Npgsql2/src/NpgsqlTypes/NpgsqlTypesHelper.cs.diff?r1=1.15&r2=1.16)