Merge pull request #2 from ajepst/feature-oracleSupport

switching Oracle to odp.net (feature-oracleSupport branch)
Added logic to allow DbType and DbTypeValue coercion using type handling strategies. This helps with native Oracle types implemented in ODAC.
Forgot one important file...
Added unit test coverage for the OracleGuidHandlingStrategy class
added oracle simplerepo inherited tests