npgsql - Npgsql2: Removed build of asp.net providers as well as

Log Message:
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Removed build of asp.net providers as well as System.Web dependencies. Now we use Daniel Nauck's providers.

Modified Files:
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Npgsql2/src:
Npgsql.build (r1.14 -> r1.15)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/npgsql/Npgsql2/src/Npgsql.build.diff?r1=1.14&r2=1.15)