add additional integer type mapping occurring in SQL Anywhere 16
fix driver error while introspecting sequences in SQL Server 2012
don't return warnings as errors in sqlsrv driver
Merge pull request #490 from deeky666/suppress-sqlsrv-driver-server-warnings

Don't return warnings as errors in sqlsrv driver
Merge pull request #489 from deeky666/fix-sqlserver2012-sequence-introspection

Fix driver error while introspecting sequences in SQL Server 2012
Merge pull request #488 from deeky666/fix-sqlanywhere16-integer-type-mapping

Fix integer type mapping in SQL Anywhere 16