[DBAL-2958] Replaced extension of \PDOStatement with a composition to avoid having to replicate the \PDOStatement interface in ResultStatement

As the explanatory description says: "The name or position of the parameter."

So they get passed to the SQLLogger on `Statement::execute`.

- Fixed docblocks
- Removed return statements on void methods
- Cleaned up unused private / local variables
- Fixed license issues
- Removed SVN leftovers
- Fixed doctrine-project.org links
- Added line breaks before return statements

When parameters are passed to Doctrine\DBAL\Statement::execute, they are not passed to any enabled logger(s).

bindParam function expects length parameter for oci_bind_by_name oci8

This reverts commit 17a265d9.

driver function

Fix Statement class passing bound parameter objects to SQL logger without type information: save parameter's converted value