Update NPGSQL from version 2.0.14.3 to 2.1.3. This is a relatively big update where 2.1.0 has a number of bug fixes, new functionality and improved performance. (see details at https://github.com/npgsql/npgsql/releases/tag/v2.1.0) The binaries supplied are for .NET 4.0 If you need binaries for older versions they can be dowloaded from https://github.com/npgsql/npgsql/releases/tag/v2.1.3. There are also binaries for 4.5.

The performance improvement is particularly evident on terrain load and other repeated queries to the database. This version will automatically generate prepare statements if it sees 5 consecutive identical statements and cache them for later use. The prepare statement will skip the analyze portion of the query planner once a statement has been created.  In addition there are improvements in the connection pool logic that will improve performance once connections get scarce.

Signed-off-by: UbitUmarov <[email protected]>