* The old implementation produced invalid SQLite statements for tables with
  a composite primary key, as SQLite cannot have more than one primary key
  clause and autoincrement can only be declared on a single column
* There is currently no way to tell from its pragma if an SQLite column
  auto-increments, therefore enabling it on all primary keys is not accurate
* SQLite primary keys auto-increment anyway (but slightly differently from an
  actual auto-increment column -- not guaranteed unique)

This is now consistent with the naming used in the ORM.

When using a PDOConnection and the Portability wrapper, the default value \PDO::CASE_NATURAL int(0) and PHP constant CASE_LOWER int(0) got mixed up.

Fixed a few cases of where MysqliStatement::execute() did not throw a exception if a error had a occured.

Hopefully final fixes. Added phpdoc @inheritdoc where it were missing. Added MysqlConnection::getWrappedResourceHandle(). MysqliStatement::fetchAll() now decide fetch style if none is set, instead of letting fetch() do it on every call.

This enables a more natural way of interacting with result sets,
and re-introduces in Doctrine DBAL a feature that has been available
in PDO from the begining.

DDC-1266 - Fixed bug where one sequence is dropped multiple times and extended that logic to tables and constraints