Customize statement creation

[muuki88]

Via the java.sql.Connection object, the statement can be customized. For example to stream results.

This would be easy to implement as a new method (just for streaming).

stmt = conn.createStatement(java.sql.ResultSet.TYPE_FORWARD_ONLY, java.sql.ResultSet.CONCUR_READ_ONLY);
stmt.setFetchSize(Integer.MIN_VALUE);

The right place for this would probably be in the RichConnection implicit class.