npgsql - Npgsql2: Added method AddWithValue and made Add(String,

Log Message:
-----------

Added method AddWithValue and made Add(String, object) obsolete and this was causing ambiguity problems with Add and
NpgsqlDbTypeand DbType. See http://pgfoundry.org/tracker/index.php?func=detail&aid=1010714&group_id=1000140&atid=590
andhttp://pgfoundry.org/tracker/index.php?func=detail&aid=1010715&group_id=1000140&atid=592 for more details. Thanks
Gildas(prime.gildas @nospam@ gmail.com) for heads up and discussion about that. Note that the issue of adding a new
methodwhich takes a DbType parameter is not finished yet. We should check if this is still needed. 

Modified Files:
--------------
    Npgsql2/src/Npgsql:
        NpgsqlParameterCollection.cs (r1.9 -> r1.10)

(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/npgsql/Npgsql2/src/Npgsql/NpgsqlParameterCollection.cs?r1=1.9&r2=1.10)
    Npgsql2/testsuite/noninteractive/NUnit20:
        CommandTests.cs (r1.32 -> r1.33)

(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/npgsql/Npgsql2/testsuite/noninteractive/NUnit20/CommandTests.cs?r1=1.32&r2=1.33)