Updated IBM DB2 and Informix data provider binaries to version 9.7.5.2 (19.10.2011).
Added DbManager.ExecuteArray method that executes several SQL statements in a single roundtrip to the server.
Data providers that support ExecuteArray natively: OdbDataProvider, DevartOracleDataProvider, DB2DataProvider, InformixDataProvider.
Default implementation of DataProviderBase.ExecuteArray falls back to iterated ExecuteNonQuery calls.
Merge branch 'master' of https://github.com/igor-tkachev/bltoolkit
Revert "Updated IBM DB2 and Informix data provider binaries to version 9.7.5.2 (19.10.2011)."

This reverts commit 844df3ea55bd74625115edc3991e304801c411db.